Exodus 29:24-37

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. 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 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. Aaron and his sons shall eat the flesh of the ram and the bread that is in the basket, at the doorway of the tent of meeting. Thus they shall eat those things by which atonement was made at their ordination and consecration; but a layman shall not eat them, because they are holy. If any of the flesh of ordination or any of the bread remains until morning, then you shall burn the remainder with fire; it shall not be eaten, because it is holy. “Thus you shall do to Aaron and to his sons, according to all that I have commanded you; you shall ordain them through seven days. Each day you shall offer a bull as a sin offering for atonement, and you shall purify the altar when you make atonement for it, and you shall anoint it to consecrate it. For seven days you shall make atonement for the altar and consecrate it; then the altar shall be most holy, and whatever touches the altar shall be holy.