From a prison courtyard in besieged Jerusalem, Jeremiah's new-covenant oracle (32:36-44) takes up the Shema's own vocabulary and turns the covenant's central demand into a covenant promise. The Shema confesses "the LORD is one" (YHWH ʾeḥād, Deut 6:4) and commands love "with all your heart and with all your soul" (bəkol ləbābəkā ûbəkol napšəkā, 6:5), with the surrounding chapter pressing Israel to fear the LORD (6:2, 13, 24). Jeremiah 32:39 deliberately reuses ʾeḥād: the God who is one now gives His people "one heart and one way (lēb ʾeḥād wəderek ʾeḥād), so that they will always fear Me" — and 32:40 internalizes it, "I will put My fear in their hearts, so that they will never turn away from Me." The reversal is sealed in 32:41, where Yahweh pledges to do them good "with all My heart and with all My soul" (bəkol-libbî ûbəkol-napšî) — the Shema's "with all your..." demand on Israel now spoken by God of Himself. This is Promise-Fulfillment, not typology: there is no type-antitype figure here, but a verbal-conceptual reuse in which the new-covenant oracle pledges to create the whole-hearted, single-hearted, God-fearing devotion the Shema could only require — the same trajectory Moses already opened (Deut 30:6) and Jeremiah and Ezekiel extend (Jer 4:4; 31:33; Ezek 36:26), hence also a Longitudinal Theme of the new-covenant heart. The Shema's unanswered problem — a divided heart that cannot keep "love the LORD with all" — meets here its divine solution: God Himself supplies the undivided heart and the fear that lasts forever. And the telos is sheer gladness, for the Giver Himself rejoices: "I will rejoice in doing them good" (32:41). The oneness of God becomes the joy of a people made one in heart toward Him — fulfilled in Christ, who alone loved the Father with all His heart and soul, and by His Spirit writes that single-hearted, joyful fear of God on His own, so that the Shema is heard at last not as crushing law but as the promise of a heart remade to delight in the one God as its supreme treasure.