The New Testament sets lines of this psalm at Jesus (John 2:17; Romans 15:3). But the psalm also says, "God, you know my foolishness. My sins aren’t hidden from you" (Psalm 69:5). Is the whole psalm about Jesus?

The New Testament gives the lines it gives. The disciples remembered the first half of Psalm 69:9 at the temple (John 2:17), and Paul (Romans 1:1) gives its second half of Christ (Romans 15:3). In John, Jesus gives "They hated me without a cause" (John 15:25) as written "in their law" (John 15:25); the psalm has "Those who hate me without a cause" (Psalm 69:4), and so does Psalm 35:19, and John doesn't say which psalm he means. None of these passages gives Psalm 69:5, and none says how the rest of the psalm bears on Jesus. The psalm says who speaks in Psalm 69:5: the same I who prays all through the psalm, speaking to God of "my foolishness" and "My sins" (Psalm 69:5) (tap foolishness, sins). Christians read how a psalm titled "By David" (Psalm 69:1) speaks of Jesus in two main ways: first of David and fulfilled in Jesus, or of Jesus directly. The chapter on Psalm 22 sets out both, each with its verses, and chooses neither. Both take the New Testament's words as the psalm's lines applied to Jesus. These notes don't choose between them, and they say no more about 69:5 than the New Testament does.