Leviticus 8:26-27

²⁶And out of the basket of unleavened bread which was before the Lord he took one unleavened cake, and one cake of bread with oil on it, and one thin cake, and put them on the fat and on the right leg:

²⁷And he put them all on the hands of Aaron and on the hands of his sons, waving them for a wave offering before the Lord.