Leviticus 9:6-8

American Standard Version

⁶ And Moses said, This is the thing which Jehovah commanded that ye should do: and the glory of Jehovah shall appear unto you. ⁷ And Moses said unto Aaron, Draw near unto the altar, and offer thy sin-offering, and thy burnt-offering, and make atonement for thyself, and for the people; and offer the oblation of the people, and make atonement for them; as Jehovah commanded.

⁸ So Aaron drew near unto the altar, and slew the calf of the sin-offering, which was for himself.