Leviticus 7:29-34

29“Tell the Israelites: Anyone who offers the Lord a fellowship offering must bring a part of that sacrifice as a gift to the Lord.

30Bring the sacrifices by fire made to the Lord yourself. Bring the fat with the breast. Take the breast and present it to the Lord.

31“The priest will burn the fat on the altar. However, the breast will belong to Aaron and his sons.

32You will also give the priest the right thigh as a contribution.

33When any of Aaron’s sons offer the blood and fat of the fellowship offering, the right thigh will belong to him as his share.

34From the fellowship offerings of the Israelites, I have taken the breast that was presented ⌞to me⌟ and the thigh from the contribution offering. I have given them to the priest Aaron and his sons. This is a permanent law for generations to come.