Exodus 29:22, 24, 26

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

You shall put all these on the palms of Aaron and on the palms of his sons, and wave them for a wave offering before the LORD.

“You shall take the breast of the ram of Aaron’s ordination and wave it for a wave offering before the LORD, and it shall be your portion.