Exodus 29:22, 24, 26

“You shall also take the fat of the ram, the fat tail, the fat that covers the intestines, the lobe of the liver, the two kidneys with the fat that is on them, and the right thigh; (for it is a ram of ordination)

and you shall put all these in the hands of Aaron and his sons, and wave them as a wave offering before the LORD.

“Then you shall take the breast of the ram of Aaron’s ordination, and wave it as a wave offering before the LORD; and it shall be your (Moses) portion.