Leviticus 16:10, 21-22

But the goat on which the lot for the scapegoat fell shall be presented alive before the LORD, to make atonement upon it, to send it into the wilderness as the scapegoat.

Then Aaron shall lay both of his hands on the head of the live goat, and confess over it all the iniquities of the sons of Israel and all their transgressions in regard to all their sins; and he shall lay them on the head of the goat and send it away into the wilderness by the hand of a man who stands in readiness. The goat shall bear on itself all their iniquities to a solitary land; and he shall release the goat in the wilderness.