Leviticus 7:33-34

³³He among the sons of Aaron who offers the blood of the peace offerings, and the fat, shall have the right thigh for a portion.

³⁴For the waved breast and the heaved thigh I have taken from the children of Israel out of the sacrifices of their peace offerings, and have given them to Aaron the priest and to his sons as their portion forever from the children of Israel.’”