Exodus 29:26-31

“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 heave offering 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 heave offering; and it shall be a heave offering from the sons of Israel from the sacrifices of their peace offerings, even their heave offering to the LORD. “The holy garments of Aaron shall be for his sons after him, that in them they may be anointed and ordained. For seven days the one of his sons who is priest in his stead shall put them on when he enters the tent of meeting to minister in the holy place. “You shall take the ram of ordination and boil its flesh in a holy place.