Exodus 29:22-24

22Also of the ram shalt thou take the fat, and the fat-tail, and the fat that covereth the inwards, and the net of the liver, and the two kidneys, and the fat that is upon them, and the right shoulder — 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 the unleavened [bread] that is before Jehovah;

24and thou shalt put all this in the hands of Aaron, and in the hands of his sons, and shalt wave them as a wave-offering before Jehovah.