Exodus 29:24-28

and you shall put all these in the hands of Aaron and in the hands of his sons, and shall wave them as a wave offering before the Lord.

Then you shall take them from their hands, and offer them up in smoke on the altar on the burnt offering for a soothing aroma before the Lord; it is an offering by fire to the Lord.

“Then you shall take the breast of Aaron’s ram of ordination, and wave it as a wave offering before the Lord; and it shall be your portion.

You shall consecrate the breast of the wave offering and the thigh of the contribution which was waved and which was offered from the ram of ordination, from the one which was for Aaron and from the one which was for his sons.

It shall be for Aaron and his sons as their portion forever from the sons of Israel, for it is a contribution; and it shall be a contribution from the sons of Israel from the sacrifices of their peace offerings, their contribution to the Lord.