Leviticus 16:5-7
5
He shall take from the congregation of the children of Israel two male goats for a sin offering, and one ram for a burnt offering.
6
"Aaron shall offer the bull of the sin offering, which is for himself, and make atonement for himself and for his house.
7
He shall take the two goats, and set them before Yahweh at the door of the Tent of Meeting.