Leviticus 7:34-36

34For I have taken the breast of the wave offering and the thigh of the heave offering from the Israelites, from the sacrifices of their peace offerings, and I have given them to Aaron the priest and to his sons as their perpetual portion from the Israelites.

35‘This is the consecrated portion from the offerings by fire to the Lord that was designated for Aaron and his sons on the day he presented them to serve as priests to the Lord.

36The Lord commanded this to be given to the priests by the Israelites on the day that He anointed them. It is their portion perpetually throughout their generations.’ ”