Leviticus 8:25-26

²⁵And from the basket of consecration, which was before the Lord, he also took one unleavened loaf, and one loaf made with oil, and one cake; and put them upon the fat, and the right shoulder:

²⁶and put them all on the hands of Aaron, and upon the hands of his sons, and offered them up for a wave-offering before the Lord.