To the end, for the taking up of the morning, a psalm of David.
1. “To the end,” for His own resurrection, the Lord Jesus Christ Himself speaks. For in the morning on the first day of the week was His resurrection, whereby He was taken up, into eternal life, “Over whom death shall have no more dominion.” Now what follows is spoken in the person of The Crucified. For from the head of this Psalm are the words, which He cried out, while hanging on the Cross, sustaining also the person of the old man, whose mortality He bare. For our old man was nailed together with Him to the Cross.
2. “O God, my God, look upon me, why have You forsaken me far from my salvation?”. Far removed from my salvation: for “salvation is far from sinners.” “The words of my sins.” For these are not the words of righteousness, but of my sins. For it is the old man nailed to the Cross that speaks, ignorant even of the reason why God has forsaken him: or else it may be thus, The words of my sins are far from my salvation.
Source: The Enarrations, or Expositions, on the Psalms (New Advent)