"For there is no word on my tongue, etc." So said David before the Almighty, "You know when I sit and when I rise; You discern my thoughts from afar. Even before I speak, You know all about it. You have hemmed me in from behind and in front; You have laid Your hand upon me" (Psalms 139:4-5). Similarly, it says in the book of Job (14:16), "For now You count my steps; You keep watch over my feet without even scrutinizing my behavior."
And not only from now, but from before I was born (Job 31:18), "Or like a newborn infant who has not seen the light: before I go where I will not return." And so it says to Jeremiah (Jeremiah 1:5), "Before I formed you in the belly, I knew you; and before you came forth from the womb, I sanctified you." And similarly, the scripture says to Hezekiah (2 Kings 19:28), "Because you have raged against Me and your arrogance has reached My ears, I will put My hook in your nose and My bit in your mouth, and I will turn you back on the way you came."
He replied to God, "O foolish one, what do you think? Don't you know everything unless you hear it?" (Isaiah 37:28). "And your sitting down and your going out and your coming in I know, and your rage against Me." Therefore it is said that there is no word on my tongue.
There is no psalm, there is no eternal melody, there is no song that I will say that is not already revealed before You. Therefore it is said that there is no word on my tongue.