This study proposes that both constitutively and rhetorically (through ironic, inferential, and indirect application), Ps 106(105) serves as the substructure for Paul's argumentation in Rom 1:18-2:11. Constitutively, Rom 1:18-32 hinges on the triadic interplay between "they (ex)changed" and "God gave them over," an interplay that creates a sin-retribution sequence with an a-ba-ba-b pattern. Both elements of this pattern derive from Ps 106(105):20, 41a respectively. Rhetorically, Paul ironically applies the psalmic language of idolatrous "(ex)change" and God's subsequent...