Leviticus 16:10-11

10But the goat upon which the lot for the scapegoat fell is to be presented alive before Adonai, to make atonement upon it, by sending it away as the scapegoat into the wilderness.

11“Also Aaron is to present the bull of the sin offering which is for himself and so make atonement for himself and his house. He is to slaughter the bull of the sin offering which is for himself.