Leviticus 9:20

18He also killed the bull and the ram, the sacrifice of peace offerings, which was for the people. Aaron’s sons delivered to him the blood, which he sprinkled around on the altar;

19and the fat of the bull and of the ram, the fat tail, and that which covers the innards, and the kidneys, and the cover of the liver;

20and they put the fat upon the breasts, and he burned the fat on the altar.

21Aaron waved the breasts and the right thigh for a wave offering before the LORD, as Moses commanded.

22Aaron lifted up his hands toward the people, and blessed them; and he came down from offering the sin offering, and the burnt offering, and the peace offerings.