Exodus 29:24-37

and put all of them in the hands of Aaron and his  sons and present them as a presentation offering before the Lord.  Take them from their hands and burn them on the altar on top of the burnt offering, as a pleasing aroma before the Lord; it is a food offering to the Lord. “Take the breast from the ram of Aaron’s ordination and present it as a presentation offering before the Lord; it is to be your portion.  Consecrate for Aaron and his sons  the breast of the presentation offering that is presented and the thigh of the contribution that is lifted up from the ram of ordination. This will belong to Aaron and his sons as a regular portion from the Israelites, for it is a contribution. It will be the Israelites’ contribution from their fellowship sacrifices, their contribution to the Lord. “The holy garments that belong to Aaron are to belong to his sons after him, so that they can be anointed and ordained  in them.  Any priest who is one of his sons and who succeeds him and enters the tent of meeting to minister in the sanctuary must wear them for seven days.  “You are to take the ram of ordination and boil its flesh in a holy place. Aaron and his sons are to eat the meat of the ram and the bread that is in the basket at the entrance to the tent of meeting.  They must eat those things by which atonement was made at the time of their ordination  and consecration. An unauthorized person must not eat  them, for these things are holy. If any of the meat of ordination or any of the bread is left until morning, burn what is left over. It must not be eaten because it is holy. “This is what you are to do for Aaron and his sons based on all I have commanded you. Take seven days to ordain them. Sacrifice a bull as a sin offering each day for atonement. Purify  the altar when you make atonement for it, and anoint it in order to consecrate it.  For seven days you must make atonement for the altar and consecrate it. The altar will be especially holy. Whatever touches the altar will be consecrated.