13:33 second psalm. The quote is from Psalm 2:7, and indicates that the prophecy applies specifically to Christ’s resurrection, rather than His birth. He had been “declared to be the Son of God…by the resurrection from the dead” (Romans 1:4). It is also significant that Paul called it “the second psalm,” just as we do today, thus indicating that the chapter divisions in the book of Psalms are not the product of medieval scholars, but were there from the beginning.