Son of David

The Davidic covenant in 2 Samuel 7:12–16 establishes the line: "I will set up thy seed after thee… and I will establish his kingdom… and thine house and thy kingdom shall be established for ever." Matthew Henry treats this passage as the constitutional ground for every later messianic expectation — every prophet who speaks of the throne of David is reading 2 Samuel 7 forward. The Psalter rehearses the covenant in Ps 89, with its anguished question of how the throne can be cast down (vv.38–45) and its closing vow that God has not lied to David (v.49). Ps 110 — "The LORD said unto my Lord, Sit thou at my right hand" — places the Davidic king at God's right hand, a placement Spurgeon's Treasury of David takes as Jesus's own proof in Matt 22 that David's Son is also David's Lord. The prophets carry the line forward: Isa 9:6–7 (the throne of David), Isa 11:1–10 (the rod from Jesse's stem), Jer 23:5 (the righteous Branch), Ezek 34:23–24 (the one Shepherd from David), and Zech 12:8 (the house of David at the day of the LORD).

Matthew opens his gospel with the title — "Jesus Christ, the son of David, the son of Abraham" (Mt 1:1) — and the genealogy that follows is structured to surface the Davidic line at exactly the right moments. The crowd's acclamations during Jesus's ministry repeatedly use the title as a messianic confession: "Have mercy on us, thou Son of David" (Mt 9:27, 20:30); "Is not this the son of David?" (Mt 12:23); the triumphal entry — "Hosanna to the Son of David" (Mt 21:9). Jesus himself sets the puzzle in Mt 22:42–45: if David in the Spirit calls Messiah "Lord," how is he then his Son? Henry treats the puzzle as Jesus inviting the Pharisees to confess what their own Scriptures already say — Messiah is at once David's Son by descent and David's Lord by deity. Paul opens Romans by stating both: "made of the seed of David according to the flesh; and declared to be the Son of God with power" (Rom 1:3–4). Revelation closes with the same two: "I am the root and the offspring of David" (Rev 22:16).

The title functions as a covenantal seal: the OT promised a Davidic king whose throne would not pass away, and the NT identifies that king. Calvin, on Romans 1, reads Paul's pairing of "seed of David" and "declared Son of God" as deliberate — Jesus is qualified to occupy the Davidic throne by lineage and qualified to make the throne everlasting by deity. Henry makes the pastoral move: Son of David tells the church that the kingdom has come from the line God promised, and Son of God tells the church that the kingdom will not end. Spurgeon, returning to Ps 110 frequently in the Treasury of David, calls the verse the Christological key to the whole Psalter — once the Spirit has shown that David's Lord sits at YHWH's right hand, every other Davidic psalm reads as a meditation on the same enthronement. The title is therefore not a genealogical curiosity but a covenantal claim: God's promise to David has not failed, and the king who occupies the throne forever does so under both titles at once.