Exodus 29:22-24

22Also thou shalt take of the ram the fat, and the fat tail, and the fat that covereth the inwards, and the caul of the liver, and the two kidneys, and the fat that is upon them, and the right thigh (for it is a ram of consecration), 23and one loaf of bread, and one cake of oiled bread, and one wafer, out of the basket of unleavened bread that is before Jehovah: 24and thou shalt put the whole upon the hands of Aaron, and upon the hands of his sons, and shalt wave them for a wave-offering before Jehovah.