Leviticus 7:29-34

29“Speak to Bnei-Yisrael, saying: Whoever brings the sacrifice of his fellowship offerings to Adonai is to present his offering to Adonai out of the sacrifice of his fellowship offerings.

30With his own hands he is to bring Adonai’s offerings by fire. He is to present the fat with the breast, so that the breast may be waved for a wave offering before Adonai.

31The kohen is to burn up the fat as smoke on the altar, but the breast will belong to Aaron and his sons.

32The right thigh you are to give to the kohen for a contribution out of the sacrifices of your fellowship offerings.

33The one among Aaron’s sons who offers the blood of the fellowship offerings and the fat is to have the right thigh for a portion.

34For the breast of the wave offering and the thigh contribution I have taken from Bnei-Yisrael out of the sacrifices of their fellowship offerings and have given them to Aaron the kohen and to his sons as their portion forever from Bnei-Yisrael.”