Leviticus 7:34-36

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

³⁵‘This is the allotment to Aaron and the allotment to his sons from the offerings by fire to the Lord, on that day when he presented them to serve as priests to the Lord. ³⁶These the Lord had commanded to be given them from the sons of Israel on the day that He anointed them. It is their allotted portion forever throughout their generations.’ ”