Leviticus 16:5

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.