Leviticus 9:1-6

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 young calf for a sin offering, and a ram for a burnt offering, without blemish, and offer them before the LORD. And unto the children of Israel thou shalt speak, saying, Take ye a kid of the goats for a sin offering; and a calf and a lamb, both of the first year, without blemish, for a burnt offering; also a bullock and a ram for peace offerings, to sacrifice before the LORD; and a meat offering mingled with oil: for to day the LORD will appear unto you. And they brought that which Moses commanded before the tabernacle of the congregation: and all the congregation drew near and stood before the LORD. And Moses said, This is the thing which the LORD commanded that ye should do: and the glory of the LORD shall appear unto you.