Leviticus 7:30-34

With his own hands he is to bring offerings by fire to the LORD; he shall bring the fat with the breast, so that the breast may be presented as a wave offering before the LORD. The priest shall offer up the fat in smoke on the altar, but the breast shall be for Aaron and his sons. You shall give the right thigh to the priest as a contribution from the sacrifices of your peace offerings. The son of Aaron who offers the blood of the peace offerings and the fat shall have the right thigh as his portion. For 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.