Messianic Prophecy: The Messiah will do God’s Will:

Prophecy:

Sacrifice and meal offering You have not desired;
My ears You have opened;
Burnt offering and sin offering You have not required.
Then I said, “Behold, I come;
In the scroll of the book it is written of me.
I delight to do Your will, O my God;
Your Law is within my heart.”

Psalm 40:6-8

Fulfillment:

For I have come down from heaven, not to do My own will, but the will of Him who sent Me.

John 6:38

Therefore, when He comes into the world, He says,

“SACRIFICE AND OFFERING YOU HAVE NOT DESIRED,
BUT A BODY YOU HAVE PREPARED FOR ME;
IN WHOLE BURNT OFFERINGS AND sacrifices FOR SIN YOU HAVE TAKEN NO PLEASURE.
“THEN I SAID, ‘BEHOLD, I HAVE COME
(IN THE SCROLL OF THE BOOK IT IS WRITTEN OF ME)
TO DO YOUR WILL, O GOD.’”

After saying above, “SACRIFICES AND OFFERINGS AND WHOLE BURNT OFFERINGS AND sacrifices FOR SIN YOU HAVE NOT DESIRED, NOR HAVE YOU TAKEN PLEASURE in them” (which are offered according to the Law), then He said, “BEHOLD, I HAVE COME TO DO YOUR WILL.” He takes away the first in order to establish the second.

Hebrews 10:5-9