Leviticus 16:6

3 Thus shall Aaron come into the holy place: with a young bullock for a sin offering, and a ram for a burnt offering.

4 He shall put on the holy linen coat, and he shall have the linen breeches upon his flesh, and shall be girded with a linen girdle, and with the linen mitre shall he be attired: these are holy garments; therefore shall he wash his flesh in water, and so put them on.

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

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

7 And he shall take the two goats, and present them before the LORD at the door of the tabernacle of the congregation.

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

9 And Aaron shall bring the goat upon which the LORD'S lot fell, and offer him for a sin offering.