Leviticus 9:18-21

18He slaughtered the ox and the ram as the fellowship offering for the people. His sons handed him the blood, and he splashed it against the sides of the altar.

19But the fat portions of the ox and the ram—the fat tail, the layer of fat, the kidneys and the long lobe of the liver—

20these they laid on the breasts, and then Aaron burned the fat on the altar.

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