Leviticus 7:29-32

²⁹“Give these instructions to the Israelites. Tell them that if you present a peace offering to the Lord you must bring part of it as a special gift to the Lord.

³⁰You must personally bring the food offerings to the Lord; bring the fat as well as the breast, and wave the breast as a wave offering before the Lord.

³¹The priest shall burn the fat on the altar, but the breast is for Aaron and his sons.

³²Give the right thigh to the priest as a contribution from your peace offering.