The Hyperlinked Bible
Intertextuality Pair
Allusion
Later text
And at the end of seventy years, the LORD will restore Tyre. Then she will return to hire as a prostitute and sell herself to all the kingdoms on the face of the earth. Yet her profits and wages will be set apart to the LORD; they will not be stored or saved, for her profit will go to those who live before the LORD, for abundant food and fine clothing.
Earlier text
You must not bring the wages of a prostitute, whether female or male, into the house of the LORD your God to fulfill any vow, because both are detestable to the LORD your God.
אֶתְנַן (etnan), the fee paid to a prostitute, is a rare and marked word standing only eight times in the Hebrew Bible. Two of those are Isaiah 23:17 and 23:18; one is Deuteronomy 23:18. Both texts pair it with זָנָה (zanah, "to prostitute oneself"). Deuteronomy forbids bringing (בּוֹא, bo') such a fee into בֵּית יְהוָה (beit YHWH, "the house of the LORD") in payment of any נֶדֶר (neder, "vow"), because both the fee and the one who earned it are תּוֹעֵבָה (to'evah) to the LORD. Isaiah takes the same two words and lays them on the other side of the ledger.
Tyre's harlotry in Isaiah 23 is commercial rather than cultic — she "returns to her hire" by trading with all the kingdoms on the face of the earth. After seventy years the LORD visits her, and the oracle closes by disposing of her earnings: her סַחַר (sachar, "profit") and her אֶתְנַן will be קֹדֶשׁ לַיהוָה (qodesh la-YHWH) — the exact antonym of Deuteronomy's verdict — neither hoarded nor stored, but going to those who dwell (יָשַׁב, yashav) before the LORD, "for abundant food and fine clothing," the language of priestly maintenance. The two verses are the whole movement: v. 17 names the offence Deuteronomy legislated against, and v. 18 announces its unimaginable disposition.
Isaiah is not softening Deuteronomy. Micah 1:7, using the same rare word, has Samaria's אֶתְנַן burned — that is the law's ordinary and just outcome. What Isaiah supplies is an agent. The LORD Himself takes the unclean thing in hand and consecrates it, which is precisely the operation no worshiper could perform and exactly why Deuteronomy had to bar the door. It is the opening movement of a stream that runs on through the wealth of the nations coming in (Isaiah 60:5-11), the LORD's claim on the silver and the gold (Haggai 2:8), and the glory and honour of the nations carried into the city that nothing unclean may enter (Revelation 21:24-27).
That stream reaches its head in Christ, who touches the leper without contracting his uncleanness and declares all foods clean (Mark 1:41; 7:19), and who says of what the law excluded, "What God has made clean, do not call common" (Acts 10:15). Holiness in Him is not fragile but contagious; it moves outward rather than recoiling. The comfort here is not that the standard was lowered — Deuteronomy's judgment on the etnan was right, and Micah shows what it deserved. It is that the Holy One is strong enough to sanctify what He once forbade us to carry in. Which is, in the end, the standing of every person who comes to Him: not smuggled past the door, but consecrated at it.