Leviticus 16:10-11

16:10 but the goat which has been designated by lot for Azazel is to be stood alive before the Lord to make atonement on it by sending it away to Azazel into the wilderness.

The Sin Offering Sacrificial Procedures

16:11 “Aaron is to present the sin offering bull which is for himself, and he is to make atonement on behalf of himself and his household. He is to slaughter the sin offering bull which is for himself,