Leviticus 7:29-32

29“Speak to the children of Israel, saying, ‘He who offers the sacrifice of his peace offerings to the Lord shall bring his offering to the Lord from the sacrifice of his peace offerings.

30With 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.

31The priest shall offer up the fat in smoke on the altar, but the breast shall be for Aaron and his sons.

32You shall give the right thigh to the priest as a contribution from the sacrifices of your peace offerings.