Leviticus 9:1-8

And it came to pass on the eighth day, that Moses called Aaron and his sons, and the elders of Israel; and he said unto Aaron, Take thee a calf of the herd for a sin-offering, and a ram for a burnt-offering, without blemish, and offer them before Jehovah. And unto the children of Israel thou shalt speak, saying, Take ye a he-goat for a sin-offering; and a calf and a lamb, both a year old, without blemish, for a burnt-offering; and an ox and a ram for peace-offerings, to sacrifice before Jehovah; and a meal-offering mingled with oil: for to-day Jehovah appeareth unto you. And they brought that which Moses commanded before the tent of meeting: and all the congregation drew near and stood before Jehovah. And Moses said, This is the thing which Jehovah commanded that ye should do: and the glory of Jehovah shall appear unto you. 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.