ISB ~ Acts 13 v33

the second psalm:Paul cites Ps 2:7 to explain how the rising of Jesus fulfills Yahweh’s oath to give one of David’s descendants everlasting dominion over Israel and the world (2 Sam 7:12-16; Ps 2:8).

• Psalm 2 is an enthronement psalm probably recited on the day the kings of Israel were anointed for office and adopted as sons by Yahweh. Paul interprets it messianically, so that the “today” of the psalm corresponds to the “Sunday” when Jesus rose from the grave. This is the day when Christ’s humanity was anointed for eternal kingship (Lk 1:32-33) and made to share in the glory of his eternal Sonship (Rom 1:4; CCC 445, 2606).

See essay:Kingdom Restorationat Acts 15.