Leviticus 16:15-17, 20-22

“Next he will slaughter the goat designated as the Absolution-Offering for the people and bring the blood inside the curtain. He will repeat what he does with the bull’s blood, sprinkling it on and before the Atonement-Cover. In this way he will make atonement for the Holy of Holies because of the uncleannesses of the Israelites, their acts of rebellion, and all their other sins. He will do the same thing for the Tent of Meeting which dwells among the people in the midst of their uncleanness. There is to be no one in the Tent of Meeting from the time Aaron goes in to make atonement in the Holy of Holies until he comes out, having made atonement for himself, his household, and the whole community of Israel.

“When Aaron finishes making atonement for the Holy of Holies, the Tent of Meeting, and the Altar, he will bring up the live goat, lay both hands on the live goat’s head, and confess all the iniquities of the People of Israel, all their acts of rebellion, all their sins. He will put all the sins on the goat’s head and send it off into the wilderness, led out by a man standing by and ready. The goat will carry all their iniquities to an empty wasteland; the man will let him loose out there in the wilderness.