Exodus 29:21-31

21 Then you shall take some of the blood that is on the altar, and some of the anointing oil, and sprinkle it on Aaron and his vestments and on his sons and his sons' vestments with him; then he and his vestments shall be holy, as well as his sons and his sons' vestments.
22 You shall also take the fat of the ram, the fat tail, the fat that covers the entrails, the appendage of the liver, the two kidneys with the fat that is on them, and the right thigh (for it is a ram of ordination),
23 and one loaf of bread, one cake of bread made with oil, and one wafer, out of the basket of unleavened bread that is before the Lord;
24 and you shall place all these on the palms of Aaron and on the palms of his sons, and raise them as an elevation offering before the Lord.
25 Then you shall take them from their hands, and turn them into smoke on the altar on top of the burnt offering of pleasing odor before the Lord; it is an offering by fire to the Lord.
26 You shall take the breast of the ram of Aaron's ordination and raise it as an elevation offering before the Lord; and it shall be your portion.
27 You shall consecrate the breast that was raised as an elevation offering and the thigh that was raised as an elevation offering from the ram of ordination, from that which belonged to Aaron and his sons.
28 These things shall be a perpetual ordinance for Aaron and his sons from the Israelites, for this is an offering; and it shall be an offering by the Israelites from their sacrifice of offerings of well-being, their offering to the Lord.
29 The sacred vestments of Aaron shall be passed on to his sons after him; they shall be anointed in them and ordained in them.
30 The son who is priest in his place shall wear them seven days, when he comes into the tent of meeting to minister in the holy place.
31 You shall take the ram of ordination, and boil its flesh in a holy place;