Acts 2:30 → 2 Samuel 7:12

In the heart of his Pentecost sermon Peter declares that David "was a prophet and knew that God had promised him on oath that He would place one of his descendants on his throne" (Acts 2:30) — a recital of the founding clause of Nathan's oracle, "I will raise up your descendant after you, who will come from your own body, and I will establish his kingdom" (2 Sam 7:12). The shared content is exact and load-bearing: a descendant from David's own body set upon David's throne, with the kingdom established. Peter frames the promise as a sworn oath; while the oath-formula itself is most explicit in the Psalter's liturgical confession (Ps 132:11, already on file), the substance Peter recites — the dynastic seed-promise of perpetual succession — is the first clause of the covenant given in 2 Sam 7:12, the text from which that liturgical oath derives. The Connection Method is Promise-Fulfillment, not typology: Peter is not drawing a type-antitype correspondence but reasoning from the covenant as a promise — David, knowing the oath could not lapse with his own death and burial (Acts 2:29), "foreseeing this, spoke about the resurrection of the Christ" (Acts 2:31). The resurrection is precisely how the promised descendant is "raised up" and seated on the throne forever; the dynastic-seed clause of 2 Sam 7:12 finds its fulfillment in the risen and enthroned Jesus. The telos: the oath sworn to David was never finally about a chair in Jerusalem but about a King whom death could not hold — so to behold the risen Christ enthroned is to see the covenant's deepest intent fulfilled in the One who is Himself the believer's life and joy, the Davidic Son worth every hope the oath ever held.