Exodus 29:22-25

“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), and one loaf of bread and one cake of bread made with oil, and one wafer out of the basket of unleavened bread that is before the LORD. 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. Then you shall take them from their hands and burn them on the altar on top of the burnt offering, as a pleasing aroma before the LORD. It is a food offering to the LORD.