Leviticus 8
Leviticus 8 narrates the ordination of Aaron and his sons — the covenant's most elaborate installation ceremony, executed before the whole assembled community. Moses washes the priests, dresses Aaron in the six-piece high priestly vestment (including the Urim and Thummim in the breastpiece), anoints first the tabernacle and all its furnishings, then Aaron himself with oil poured on his head. The ordination requires three animals: a sin offering bull (for atonement), a burnt offering ram (for total consecration), and an ordination ram (whose blood is applied to the priests' right earlobes, right thumbs, and right big toes, with the remaining oil and blood sprinkled over the priests and their garments). The ordination feast is eaten at the tent's entrance; Aaron and his sons must remain there for all seven days of the installation. The chapter closes with the compliance formula: Aaron and his sons did everything the Lord commanded through Moses — the first recorded act of the newly ordained priesthood is complete obedience.
Leviticus 8:29
Moses also took the breast and waved it before the Lord as Moses' share of the ordination ram. Moses receives the wave breast of the ordination ram as his portion — the officiating priest's share of the fellowship offering's breast. Moses who is not a priest but performs the role of officiant at the ordination receives the officiating priest's traditional portion. The provision for Moses at the ordination communicates the provision that will sustain the priests who officiate at every subsequent fellowship offering: the breast that Moses waves and receives is the type of the wave breast that the priests will receive from every fellowship offering the congregation brings.
Leviticus 8:30
Then Moses took some of the anointing oil and some of the blood from the altar and sprinkled them on Aaron and his garments and on his sons and their garments. He thus consecrated Aaron and his garments and his sons and their garments. The combined sprinkling of anointing oil and altar blood on the priests and their vestments is the final act of consecration. The oil that consecrates and the blood that atones together mark both the persons and the garments they wear. The priests and their vestments are equally consecrated: what the priest wears is as holy as the priest who wears it. The garments that give dignity and honor cannot be separated from the persons who wear them — both are consecrated by the same combined sprinkling.
Leviticus 8:31
Then Moses said to Aaron and his sons, cook the meat at the entrance to the tent of meeting and eat it there with the bread from the ordination offerings basket, as I commanded, saying, Aaron and his sons are to eat it. The ordination meal — cooking the ordination ram's meat at the tent's entrance and eating it with the bread — is the covenant meal that inaugurates the priestly ministry. The meal eaten at the entrance to the tent of meeting is the meal eaten at the threshold between the ordinary and the sacred, between the world and the presence of God. The priestly ministry begins with a meal: the covenant fellowship that the fellowship offering celebrates is enacted first by the priests themselves at their installation.