Maybe you are slow of comprehension?
(during Jesus' mortal life) As David wrote, “He (Jesus) asked life of You (God), and You (God) gave it to him, length of days forever and ever” (Psalm 21:4).
(during Jesus' mortal life) Jesus affirmed, “The Father has granted the Son to have life in Himself” (John 5:26).
(during Jesus' mortal life) Jesus declared, “I am the bread of life” (John 6:35) and, “I am the way, the truth, and the life. No one comes to the Father (for Life) except through me” (John 14:6).
(during Jesus' mortal life) “I live because of the Father” (John 6:57), and again, “As the Father has life in Himself, so He has granted the Son to have life in Himself” (John 5:26).
David's words are a prophecy of what Christ would ask of his Father
Jesus' word was spoken by Jesus during his mortal life while he was alive.
The only person babbling nonsense is the one who cannot understand or interpret the words of David, Jesus and Paul.