Where in the Bible did Jesus ask God to prepare a body to go down and redeem man?

"For it is not possible that the blood of bulls and of goats should take away sins. Wherefore when He cometh into the world, He saith, Sacrifice and offering thou wouldest not, but a body hast thou prepared Me: in burnt offerings and sacrifices for sin thou hast had no pleasure. Then said I, lo, I come (in the volume of the book it is written of Me,) to do thy will, O God." (I (Heb.10:4-7)

Additional thoughts:

Jesus didn't so much ASK for a body, as recount the event.

Another translation of the above scripture at Hebrews 10 says "Therefore, when Christ came into the world, he said: "Sacrifice and offering you did not desire, but a body you prepared for me..."(NIV) This fulfilled prophecies at (Psalm 40:6-8)(Isaiah 50:4-6)
I don't think you'll find that exact quote. A search in BibleGateway (for "prepare body") turns up only one quotation, Hebrews 10:5; but it seems to be quite unrelated to the question (searcing in "King James Version"):

4 For it is not possible that the blood of bulls and of goats should take away sins.

5 Wherefore when he cometh into the world, he saith, Sacrifice and offering thou wouldest not, but a body hast thou prepared me:

6 In burnt offerings and sacrifices for sin thou hast had no pleasure.

Of course, it's possible that it says something similar in somewhat different Words.