Leviticus 7:35-38

35This is the portion from the food offerings to the Lord for Aaron and his sons since the day they were presented to serve the Lord as priests.

36The Lord commanded this to be given to them by the Israelites on the day he anointed them. It is a permanent portion throughout their generations.

37This is the law for the burnt offering, the grain offering, the sin offering, the guilt offering, the ordination offering, and the fellowship sacrifice,

38which the Lord commanded Moses on Mount Sinai on the day he commanded the Israelites to present their offerings to the Lord in the Wilderness of Sinai.