Leviticus 9:7-8
Leviticus 9:7-8 ASV
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. So Aaron drew near unto the altar, and slew the calf of the sin-offering, which was for himself.