Leviticus 16:7 ASV

⁵  And he shall take of the congregation of the children of Israel two he-goats for a sin-offering, and one ram for a burnt-offering.

⁶  And Aaron shall present the bullock of the sin-offering, which is for himself, and make atonement for himself, and for his house.

⁷  And he shall take the two goats, and set them before Jehovah at the door of the tent of meeting.

⁸  And Aaron shall cast lots upon the two goats; one lot for Jehovah, and the other lot for Azazel.

⁹  And Aaron shall present the goat upon which the lot fell for Jehovah, and offer him for a sin-offering.