Trajectory Table
Hagar and Ishmael (Children of the Flesh)
11 stages
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Hagar the Egyptian slave woman and her son Ishmael stand within Scripture's narrative of covenant succession as the line that God's promise did not follow—the line born κατὰ σάρκα ("according to the flesh") rather than through the promise. Paul gives this material its fullest Christian reading in Galatians 4:21-31, where he does something unusual: he signals that these things are being spoken allegorically (ἀλληγορούμενα, Gal 4:24 — the table's rendering of Paul's participle; the BSB reads "These things serve as illustrations"). This is Paul's only NT use of the verb ἀλληγορέω—he deliberately does not use his normal τύπος vocabulary (cf. Rom 5:14; 1 Cor 10:6,11). Paul draws associative correspondences between the two historical women and two covenantal realities: Hagar corresponds to Mount Sinai and present Jerusalem (all producing slave-children); Sarah corresponds to the heavenly Jerusalem (producing free-children). The argument is a Pauline allegory grounded in real history, structured by contrast (flesh vs. Spirit; slavery vs. freedom; Sinai vs. Zion), and anchored to a genuine promise-fulfillment spine—the Gen 21:12 declaration "through Isaac your offspring will be reckoned" that Paul traces to Christ, the seed of promise (Gal 3:16). It is not, in the strict Fairbairnian sense, a typology: the Hagar↔Sinai correspondence is associative rather than structural, and the "antitype" (slave-covenant) does not escalate the type (slave-woman) but is equated in kind with it. Paul's own word choice (ἀλληγορούμενα, not τύπος) and Greidanus's explicit warning that Paul's allegorical use in Galatians 4 cannot simply be replicated without careful qualification jointly require that we classify this trajectory as analogy, not typology. This trajectory traces the Hagar-Ishmael material through its OT canonical development (Gen 16–21), its prophetic re-use in Isaiah 54's barren-woman-vindicated oracle (quoted by Paul at Gal 4:27), and Paul's two distinct NT handlings of the same texture—allegorical in Galatians 4, election-and-promise in Romans 9—demonstrating that covenant inheritance belongs exclusively to children born according to promise through faith in Christ, not according to the flesh.
Related Trajectory Tables — TT 164 — Two Covenants (Law and Promise) treats the same Galatians 4:21-31 passage from the covenantal side: TT 164 owns the Law/Promise covenantal structure canon-wide (Sinai conditionality, curse, new covenant), while this table owns the persons/narrative trajectory (Hagar, Ishmael, Sarah, Isaac — Gen 16–21) and Paul's allegorical method. Also cross-reference the negative-foil sibling TT 054 — Esau (Rom 9:10-13 immediately extends the Isaac/Ishmael logic to Jacob/Esau) and the Isaac/Sarah promise-seed positive — TT 077 — Isaac and TT 139 — Sarah — against which this "children of the flesh" line stands as the dark foil.
How this connects — Method
Analogy (Pauline allegory, ἀλληγορέω) and Contrast (joint primary) — Analogy names Paul's hermeneutical mechanism: he frames his reading as ἀλληγορούμενα (Gal 4:24), his only NT use of this verb; Hagar↔Sinai is an associative correspondence, not a structural/functional one, and fails Fairbairn's correspondence and escalation criteria for a valid type; the Galatians are children of promise "like Isaac" (κατὰ Ἰσαάκ, G2596, Gal 4:28). Contrast structures the argument's antithesis: two women, two covenants, two Jerusalems, two kinds of children, flesh vs. Spirit, slavery vs. freedom; Gal 4:30 ("Expel the slave woman and her son") and Gal 5:1 ("It is for freedom that Christ has set us free") sharpen the contrast to ecclesial boundary. Also Promise-Fulfillment (secondary in mechanism-order, but the load-bearing christological engine — the christology travels this spine and survives the allegory-free Romans 9 handling; Analogy and Contrast are the vehicle) — Gen 21:12 ("through Isaac your offspring will be reckoned") anchors a genuine promise trajectory fulfilled in Christ as the seed of promise (Gal 3:16; Rom 9:7-8). Also Longitudinal Theme (supporting) — Seed and Offspring and Law and Righteousness both run through this trajectory.
IOT Origin - Human Effort to Secure the SeedOrigin
Texts
1Now Abram's wife Sarai had borne him no children, but she had an Egyptian maidservant named Hagar. 2So Sarai said to Abram, "Look now, the LORD has prevented me from bearing children. Please go to my maidservant; perhaps I can build a family by her." And Abram listened to the voice of Sarai. 3So after he had lived in Canaan for ten years, his wife Sarai took her Egyptian maidservant Hagar and gave her to Abram to be his wife. 4And he slept with Hagar, and she conceived. But when Hagar realized that she was pregnant, she began to despise her mistress. 5Then Sarai said to Abram, "May the wrong done to me be upon you! I delivered my servant into your arms, and ever since she saw that she was pregnant, she has treated me with contempt. May the LORD judge between you and me." 6"Here," said Abram, "your servant is in your hands. Do whatever you want with her." Then Sarai treated Hagar so harshly that she fled from her.
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IIOT Development - Covenant Distinguished from Natural DescentDevelopment
Texts
15And Hagar bore Abram a son, and Abram gave the name Ishmael to the son she had borne. 16Abram was eighty-six years old when Hagar bore Ishmael to him.
18And Abraham said to God, "O that Ishmael might live under Your blessing!" 19But God replied, "Your wife Sarah will indeed bear you a son, and you are to name him Isaac. I will establish My covenant with him as an everlasting covenant for his descendants after him. 20As for Ishmael, I have heard you, and I will surely bless him; I will make him fruitful and multiply him greatly. He will become the father of twelve rulers, and I will make him into a great nation. 21But I will establish My covenant with Isaac, whom Sarah will bear to you at this time next year."
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IIIOT Crisis - Expulsion and the "Through Isaac" PrincipleCrisis
Texts
8So the child grew and was weaned, and Abraham held a great feast on the day Isaac was weaned. 9But Sarah saw that the son whom Hagar the Egyptian had borne to Abraham was mocking her son, 10and she said to Abraham, "Expel the slave woman and her son, for the slave woman's son will never share in the inheritance with my son Isaac!" 11Now this matter distressed Abraham greatly because it concerned his son Ishmael. 12But God said to Abraham, "Do not be distressed about the boy and your maidservant. Listen to everything that Sarah tells you, for through Isaac your offspring will be reckoned. 13But I will also make a nation of the slave woman’s son, because he is your offspring.” 14Early in the morning, Abraham got up, took bread and a skin of water, put them on Hagar’s shoulders, and sent her away with the boy. She left and wandered in the Wilderness of Beersheba. 15When the water in the skin was gone, she left the boy under one of the bushes. 16Then she went off and sat down nearby, about a bowshot away, for she said, “I cannot bear to watch the boy die!” And as she sat nearby, she lifted up her voice and wept. 17Then God heard the voice of the boy, and the angel of God called to Hagar from heaven, “What is wrong, Hagar? Do not be afraid, for God has heard the voice of the boy where he lies. 18Get up, lift up the boy, and take him by the hand, for I will make him into a great nation.” 19Then God opened her eyes, and she saw a well of water. So she went and filled the skin with water and gave the boy a drink. 20And God was with the boy, and he grew up and settled in the wilderness and became a great archer. 21And while he was dwelling in the Wilderness of Paran, his mother got a wife for him from the land of Egypt.
Canonical Intertextuality Pairs2
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IVOT Principle - Natural Lineage Does Not Equal Covenant MembershipPrinciple
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13But I will also make a nation of the slave woman’s son, because he is your offspring.” 17Then God heard the voice of the boy, and the angel of God called to Hagar from heaven, “What is wrong, Hagar? Do not be afraid, for God has heard the voice of the boy where he lies. 18Get up, lift up the boy, and take him by the hand, for I will make him into a great nation.”
Foundation Texts1
VOT Prophetic Bridge - Barren Zion's Vindication (Isa 54:1)Prophetic Bridge
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1“Shout for joy, O barren woman, who bears no children; break forth in song and cry aloud, you who have never travailed; because more are the children of the desolate woman than of her who has a husband,” says the LORD. 2“Enlarge the site of your tent, stretch out the curtains of your dwellings, do not hold back. Lengthen your ropes and drive your stakes in deep. 3For you will spread out to the right and left; your descendants will dispossess the nations and inhabit the desolate cities.
Canonical Intertextuality Pairs1
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VINT Interpretive Move - Paul's Allegory of Hagar and SinaiInterpretive Move
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25Now Hagar stands for Mount Sinai in Arabia and corresponds to the present-day Jerusalem, because she is in slavery with her children.
Canonical Intertextuality Pairs1
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VIINT Exposition - Two Women, Two Covenants, Two Children (Gal 4:21-31)Exposition
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21Tell me, you who want to be under the law, do you not understand what the law says? 22For it is written that Abraham had two sons, one by the slave woman and the other by the free woman. 23His son by the slave woman was born according to the flesh, but his son by the free woman was born through the promise. 24These things serve as illustrations, for the women represent two covenants. One covenant is from Mount Sinai and bears children into slavery: This is Hagar. 25Now Hagar stands for Mount Sinai in Arabia and corresponds to the present-day Jerusalem, because she is in slavery with her children. 26But the Jerusalem above is free, and she is our mother. 27For it is written: "Rejoice, O barren woman, who bears no children; break forth and cry aloud, you who have never travailed; because more are the children of the desolate woman than of her who has a husband." 28Now you, brothers, like Isaac, are children of promise. 29At that time, however, the son born by the flesh persecuted the son born by the Spirit. It is the same now. 30But what does the Scripture say? "Expel the slave woman and her son, for the slave woman's son will never share in the inheritance with the free woman's son." 31Therefore, brothers, we are not children of the slave woman, but of the free woman.
Canonical Intertextuality Pairs1
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VIIIParallel NT Development - Children of Promise, Not of Flesh (Rom 9:6-9)Parallel NT Development
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6It is not as though God’s word has failed. For not all who are descended from Israel are Israel. 7Nor because they are Abraham’s descendants are they all his children. On the contrary, “Through Isaac your offspring will be reckoned.” 8So it is not the children of the flesh who are God’s children, but it is the children of the promise who are regarded as offspring. 9For this is what the promise stated: “At the appointed time I will return, and Sarah will have a son.”
Canonical Intertextuality Pairs2
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IXNT Application - Flesh vs. Spirit in the ChurchApplication
Texts
30But what does the Scripture say? "Expel the slave woman and her son, for the slave woman's son will never share in the inheritance with the free woman's son." 31Therefore, brothers, we are not children of the slave woman, but of the free woman.
1It is for freedom that Christ has set us free. Stand firm, then, and do not be encumbered once more by a yoke of slavery.
35A slave is not a permanent member of the family, but a son belongs to it forever. 36So if the Son sets you free, you will be free indeed.
Canonical Intertextuality Pairs1
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XNT Inauguration - Children of the Jerusalem Above (Already)Inauguration
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26But the Jerusalem above is free, and she is our mother.
22Instead, you have come to Mount Zion, to the city of the living God, the heavenly Jerusalem. You have come to myriads of angels 23in joyful assembly, to the congregation of the firstborn, enrolled in heaven. You have come to God the Judge of all, to the spirits of the righteous made perfect, 24to Jesus the mediator of a new covenant, and to the sprinkled blood that speaks a better word than the blood of Abel.
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XIEschatological Consummation - The Bride-City Descends (Not Yet)Eschatological Consummation
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2I saw the holy city, the new Jerusalem, coming down out of heaven from God, prepared as a bride adorned for her husband. 3And I heard a loud voice from the throne saying: "Behold, the dwelling place of God is with man, and He will dwell with them. They will be His people, and God Himself will be with them as their God. 9Then one of the seven angels with the seven bowls full of the seven final plagues came and said to me, "Come, I will show you the bride, the wife of the Lamb." 10And he carried me away in the Spirit to a mountain great and high, and showed me the holy city of Jerusalem coming down out of heaven from God, 11shining with the glory of God. Its radiance was like a most precious jewel, like a jasper, as clear as crystal.
27But nothing unclean will ever enter it, nor anyone who practices an abomination or a lie, but only those whose names are written in the Lamb's Book of Life.
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Four-Step Application
1. What You Must Do
You must be born "according to the Spirit," not "according to the flesh." You must stop trusting in your human effort, religious performance, or inherited credentials, and receive your standing before God as a gift of grace through faith alone.
2. Why You Can't Do It
You keep producing Ishmaels. When God's promise seems slow, you devise plans to help Him along—religious achievements to supplement grace, moral performance to bolster faith, spiritual credentials to secure your position. You want to contribute something to your salvation because pure gift feels too precarious, too out of your control. Ishmael was Abraham's own effort; Isaac was God's miraculous gift. You keep preferring Ishmael because at least you can take credit for him. Even your best religious efforts are "according to the flesh"—human striving that cannot produce what only God can give.
3. How He Did It
Jesus is the ultimate child of promise—the only-begotten Son, given by the Father, born of a virgin (even more impossible than Sarah's conception). Unlike Ishmael, who was born through natural human process, Jesus entered the world through pure divine initiative: "The Holy Spirit will come upon you, and the power of the Most High will overshadow you" (Luke 1:35). He is the promised seed through whom all nations are blessed (Gal 3:16)—the one to whom the "through Isaac" promise trajectory points. And He secured our adoption not through our flesh-efforts but through His flesh—given on the cross, that we might become children of God by faith.
4. How Through Him You Can
United to Christ by faith, you are reclassified: no longer among the flesh-born, but among the children of promise. "Now you, brothers, like Isaac, are children of promise" (Galatians 4:28). Your standing before God rests not on what you produced but on what He gave. You are children of "the Jerusalem above," which is free. The slave does not remain in the house forever, but the son remains forever—and in Christ, you are sons and daughters, not slaves. You belong permanently, not because of your performance but because of His promise. Stop laboring to birth your own righteousness. Receive what the barren woman received: a child of promise, impossible by human reckoning, given entirely by grace.
5. Beholding the Free Woman's Son (Telos — 2 Corinthians 3:18)
The deletion test warns of this table's subtler moralism: not "shine harder" but "trust harder—stop producing Ishmaels by resolving to depend on God more." But you cannot cease from the flesh by a firmer act of the flesh; that resolve would itself be another Ishmael, self-salvation in a humbler coat. The exit is closed only where the once-enslaved heart is given a superior treasure to behold and savor—and Paul places that terminus one letter away, for Galatians 4 and 2 Corinthians 3 are the same argument in two keys: the old covenant (Sinai, slavery, the veil) set against the new (Spirit, freedom, glory). "Where the Spirit of the Lord is, there is freedom" (2 Cor 3:17) is the very freedom of "It is for freedom that Christ has set us free" (Gal 5:1). So the child of promise, freed from the yoke of slavery, with unveiled face beholds the glory of the Lord and is "being transformed into His image with intensifying glory" (2 Cor 3:18)—beholding the free woman's Son, the promised Seed (Gal 3:16), conceived by the Spirit (Luke 1:35), the ultimate child of promise who takes the flesh-born and makes them heirs. The theme terminates not in a better grade of trusting, and not even in freedom as a gift enjoyed for its own sake, but in beholding Christ the promised Seed Himself, desired above the flesh's self-made securities—freedom is the mode of communion with Him—the indicative and the divine passive last ("you… are children of promise"; "being transformed"). Sight unto savoring: God most glorified in the once-enslaved heart most satisfied in the Son Himself, who is altogether lovely.
Across the whole trajectory
Wider canonical web
- Genesis 21.8-21 to Genesis 16.1-16 - Supporting/thematic (narrative recall): (kept as a supporting thematic link, not a CRITICAL one. Genesis 21 does recall Genesis 16 in the narrator's own Hebrew: the chapter never names Ishmael, calling him instead "the son whom Hagar the Egyptian had borne to Abraham" (21:9), the wording of his birth at 16:1 and 16:15; and "God has heard the voice of the boy" (21:17) answers the reason given for his name at 16:11, "the LORD has heard your cry of affliction," as the wilderness scene of 21:14-21 retraces 16:6-14 in largely the same order. But this is one narrative returning to its own characters, not a later text interpreting an earlier one, and the word that defines this trajectory is not shared in the Hebrew: Genesis 16 names the slave woman שִׁפְחָה, Genesis 21 names her אָמָה. The table's route to Christ runs through Genesis 21:10 and 21:12 as Paul reads them (Gal 4:21-31; Rom 9:7-8); the origin→expulsion arc keeps full narrative force) This connects Hagar's initial flight (Genesis 16) with her final expulsion (Genesis 21), showing the arc of the Ishmael narrative. Genesis 16 introduces Hagar as Sarai's Egyptian servant whom Abram takes as a secondary wife to produce an heir through human effort (vv. 1-4). When Hagar conceives, conflict erupts, and she flees into the wilderness (vv. 5-6), where the angel of the LORD finds her and commands her to return, promising that her son Ishmael will be "a wild donkey of a man" living in hostility toward his brothers (vv. 7-12). Genesis 21:8-21 narrates the crisis when Sarah sees teenage Ishmael "mocking" (מְצַחֵק, metzacheq) young Isaac during his weaning feast. Sarah demands Hagar and Ishmael's permanent expulsion: "Expel the slave woman and her son, for the slave woman's son will never share in the inheritance with my son Isaac!" (v. 10). Though Abraham is distressed, God confirms Sarah's command: "through Isaac your offspring will be reckoned" (v. 12), establishing that covenant inheritance passes exclusively through Isaac, not Ishmael. The pair demonstrates canonical development: Genesis 16 shows the origin of the flesh-born son; Genesis 21 shows his exclusion from covenant succession. This OT-internal trajectory becomes the foundation for Paul's allegory in Galatians 4.
- Genesis 21.1 to Genesis 11.30 - Genesis 21:1 ("the LORD attended to Sarah as He had said") resolves the barrenness crisis introduced at 11:30 ("Sarai was barren; she had no children"). The verbal echo is with the promise itself — "as He had said" (Genesis 18:10, 14 → 21:1) — not with 11:30; this narrative resolution heightens the theological point: the promise-son is produced by divine initiative overcoming biological impossibility, not by human capacity. This pattern establishes the Sarah-paradigm that Isaiah 54:1 later universalizes to exiled Zion and that Paul (quoting Isa 54:1 in Gal 4:27) applies to the heavenly-Jerusalem-as-mother.
Lexicon Findings
The Hagar-Ishmael trajectory reveals a profound lexical network contrasting two modes of existence. The Hebrew term שִׁפְחָה (shiphchah, H8198) designates Hagar as a "female slave" or "maidservant," establishing her status as one who bears children into bondage. She is identified as מִצְרִית (mitsrit, H4713), "Egyptian"—outside the covenant people. Her son יִשְׁמָעֵאל (Yishmael, H3458) means "God will hear," yet he represents the זֶרַע (zera, H2233) "seed/offspring" born according to human effort. The wordplay intensifies when Ishmael מְצַחֵק (metzacheq, from H6711 צָחַק tsachaq, "to mock/sport") toward Isaac—whose very name derives from the same root meaning "laughter."
Paul's Greek terminology crystallizes the flesh/promise contrast: κατὰ σάρκα (kata sarka, G4561) "according to flesh" versus κατὰ πνεῦμα (kata pneuma, G4151) "according to Spirit"; δουλεία (douleia, G1397) "slavery/bondage" versus ἐπαγγελία (epangelia, G1860) "promise." This lexical architecture demonstrates that covenant inheritance operates not through natural σάρξ (flesh/human ability) but through supernatural πνεῦμα (Spirit/divine power), liberating believers from δουλεία (slavery to law) into the freedom of ἐπαγγελία (promise received by faith).
Key Lexical Threads:
- Hebrew: the slave-mother is named by two synonyms — שִׁפְחָה (shiphchah, H8198) "maidservant" in the Genesis 16 conception narrative (16:1,2,3,5,6,8) and אָמָה (amah, H519) "slave woman" in the Genesis 21 expulsion narrative (21:10,12,13); the LXX renders both with the single word παιδίσκη (paidiskē, G3814) — the very term Paul quotes (Galatians 4:22-23, 30-31), so the slave-woman/free-woman (παιδίσκη/ἐλευθέρα) contrast rests on one Greek word though the Hebrew uses two.
- Hebrew: זֶרַע (zera) "seed/offspring" - appears in Genesis 21:12,13; Romans 9:7-8
- Hebrew: צָחַק (tsachaq) "to laugh/mock" - root of both Isaac's name and Ishmael's mocking (Genesis 21:9)
- Greek: σάρξ (sarx) "flesh" - contrasts with πνεῦμα throughout Galatians 4:23,29
- Greek: πνεῦμα (pneuma) "Spirit" - birth mode of promise-children (Galatians 4:29)
- Greek: δουλεία (douleia) "slavery/bondage" - Hagar's condition typifying old covenant (Galatians 4:24-25)
- Greek: ἐπαγγελία (epangelia) "promise" - Isaac born through promise (Galatians 4:23,28)
Lexicon References:
- H8198 - שִׁפְחָה (shiphchah) "maidservant, female slave"
- H519 - אָמָה (amah) "slave woman, female servant" — the Genesis 21 term for Hagar (21:10,12,13)
- H4713 - מִצְרִי (mitsri) "Egyptian"
- H3458 - יִשְׁמָעֵאל (Yishmael) "God will hear"
- H2233 - זֶרַע (zera) "seed, offspring, posterity"
- H6711 - צָחַק (tsachaq) "to laugh, mock, play, sport"
- G4561 - σάρξ (sarx) "flesh, human nature, earthly nature"
- G4151 - πνεῦμα (pneuma) "spirit, breath, Spirit"
- G1397 - δουλεία (douleia) "slavery, bondage"
- G1860 - ἐπαγγελία (epangelia) "promise, divine assurance"
All Foundation Texts
Detailed exegetical analyses of each key passage in this trajectory, including Hebrew/Greek key terms, canonical connections, and Christological development.
- Genesis 16:1-6 — After ten years in Canaan with no child from Sarai, she took matters into her own hands by giving her Egyptian servant Hagar to Abram to produce an heir thro...
- Genesis 16:15-16 — Hagar bore Ishmael when Abram was eighty-six years old—still fourteen years before Isaac's birth (Genesis 21:5, when Abraham was 100).
- Genesis 17:18-21 — Abraham's plea "O that Ishmael might live under Your blessing!" and God's emphatic refusal; covenant established with Isaac alone while natural blessing (fruitfulness, twelve princes) is granted Ishmael — the foundational text for the natural-blessing vs. covenant-inheritance distinction Paul exploits in Rom 9:7-8.
- Genesis 21:13-18 — Though Ishmael was expelled from covenant succession, God promised him natural blessings—numerous descendants and a "gre...
- Genesis 21:8-21 — When Isaac was weaned (probably around age 3), Abraham held a feast.
- Isaiah 54:1-3 — The barren-woman-vindicated oracle Paul quotes in Gal 4:27. Covers: exilic context (post-destruction Zion); prophetic inversion (barren woman out-produces married woman); connection to Gen 11:30 → 21:1 Sarah-paradigm universalized to eschatological Zion; new-exodus / expanded-Zion trajectory.
- Galatians 4:21-31 — The fullest NT exposition of the Hagar-Ishmael material, explicitly framed by Paul as ἀλληγορούμενα.
- Galatians 4:25 — Paul's allegorical move: "Hagar stands for (ἐστίν, estin) Mount Sinai in Arabia and corresponds (συστοιχεῖ) to the present Jerusalem..."
- Galatians 4:26 — In contrast to "the present Jerusalem" which "is in slavery with her children" (Galatians 4:25), Paul declares: "But the Jerusalem above is free, and she is ...
- Galatians 4:30-31 — Paul quotes Genesis 21:10 (LXX): "Expel the slave woman and her son, for the slave woman's son will never share in the inheritance with the free ...
- Romans 9:6-9 — Paul's non-allegorical parallel handling of Gen 21:12. Covers: citation of Gen 21:12 in Rom 9:7; the "children of the flesh" / "children of the promise" distinction without Gal 4's allegorical apparatus; the election-and-promise framework extending to Jacob/Esau; comparative light on Gal 4's allegorical framing of the same texture.
- Revelation 21:2-11 — The descending bride-city as the consummation of the Jerusalem-above motif (Gal 4:26; Heb 12:22), including Rev 21:27 as the exclusion text that completes the flesh-born/promise-born boundary eschatologically.