Leviticus 7:35-38

35This is the anointing-portion of Aaron, and the anointing-portion of his sons, out of the offerings of the LORD made by fire, in the day when he presented them to minister unto the LORD in the priest’s office; 36which the LORD commanded to be given them of the children of Israel, in the day that he anointed them. It is a due for ever throughout their generations. 37This is the law of the burnt offering, of the meal offering, and of the sin offering, and of the guilt offering, and of the consecration, and of the sacrifice of peace offerings; 38which the LORD commanded Moses in mount Sinai, in the day that he commanded the children of Israel to offer their oblations unto the LORD, in the wilderness of Sinai.