Leviticus 16:8-10

8And Aaron shall cast lots upon the two goats; one lot for the Lord, and the other lot for the scapegoat.1

9And Aaron shall bring the goat upon which the Lord’s lot fell, and offer him for a sin offering.2

10But the goat, on which the lot fell to be the scapegoat, shall be presented alive before the Lord, to make an atonement with him, and to let him go for a scapegoat into the wilderness.