81 And the Lord spoke to Moses, saying: 2 "Take Aaron and his sons with him, and the garments, the anointing oil, a bull as the sin offering, two rams, and a basket of unleavened bread; 3 and gather all the congregation together at the door of the tabernacle of meeting." 4 So Moses did as the Lord commanded him. And the congregation was gathered together at the door of the tabernacle of meeting. 5 And Moses said to the congregation, "This is what the Lord commanded to be done." 6 Then Moses brought Aaron and his sons and washed them with water. 7 And he put the tunic on him, girded him with the sash, clothed him with the robe, and put the ephod on him; and he girded him with the intricately woven band of the ephod, and with it tied the ephod on him. 8 Then he put the breastplate on him, and he put the Urim and the Thummim in the breastplate. 9 And he put the turban on his head. Also on the turban, on its front, he put the golden plate, the holy crown, as the Lord had commanded Moses. 10 Also Moses took the anointing oil, and anointed the tabernacle and all that was in it, and consecrated them. 11 He sprinkled some of it on the altar seven times, anointed the altar and all its utensils, and the laver and its base, to consecrate them. 12 And he poured some of the anointing oil on Aaron's head and anointed him, to consecrate him. 13 Then Moses brought Aaron's sons and put tunics on them, girded them with sashes, and put hats on them, as the Lord had commanded Moses.
Matthew Henry's Commentary on Leviticus 8:1-13
Commentary on Leviticus 8:1-13
(Read Leviticus 8:1-13)
The consecration of Aaron and his sons had been delayed until the tabernacle had been prepared, and the laws of the sacrifices given. Aaron and his sons were washed with water, to signify that they ought to purify themselves from all sinful dispositions, and ever after to keep themselves pure. Christ washes those from their sins in his own blood whom he makes kings and priests to our God, Hebrews 10:22. The anointing of Aaron was to typify the anointing of Christ with the Spirit, which was not given by measure to him. All believers have received the anointing.