Leviticus 16:20

17 No one may be in the Tent of Meeting from the time Aaron goes in to make atonement in the Most Holy Place until he leaves, after he has made atonement for himself, his household, and the whole assembly of Israel.

18 Then he shall go out to the altar that is before the LORD and make atonement for it. He is to take some of the bull’s blood and some of the goat’s blood and put it on all the horns of the altar.

19 He is to sprinkle some of the blood on it with his finger seven times to cleanse it and consecrate it from the uncleanness of the Israelites.

20 When Aaron has finished purifying the Most Holy Place, the Tent of Meeting, and the altar, he is to bring forward the live goat.

21 Then he is to lay both hands on the head of the live goat and confess over it all the iniquities and rebellious acts of the Israelites in regard to all their sins. He is to put them on the goat’s head and send it away into the wilderness by the hand of a man appointed for the task.

22 The goat will carry on itself all their iniquities into a solitary place, and the man will release it into the wilderness.

23 Then Aaron is to enter the Tent of Meeting, take off the linen garments he put on before entering the Most Holy Place, and leave them there.