Leviticus 8:2

Take Aaron and his sons with him, and the garments, and the anointing oil, and a bullock for the sin offering, and two rams, and a basket of unleavened bread;

Take Aaron, and his sons with him,.... That is, order them to come, or send a message to them, that they appear at such a time at the door of the tabernacle of the congregation, where the ceremony of consecration was to be performed, and was performed, Leviticus 8:3 which is observed and recorded by Moses, to show that he had a divine warrant for what he did, and that it was not from favour and affection to his brother, and because of the relation he and his family stood in to him, that he invested him and them with the priestly office, but it was by a command from the Lord; nor did Aaron take this honour to himself, but was called of God to it, Hebrews 5:4:

and the garments; the garments for the priesthood, ordered and described, and now made, see Exodus 28:1

and the anointing oil; which also was ordered to be made, and now was made, Exodus 30:23

and a bullock for the sin offering, and two rams, and a basket of unleavened bread; which were all to be used at the consecration with the anointing oil Aaron was to be anointed, and also the tabernacle and the altar; and the bullock was to be a sin offering, and one of the rams a burnt offering for Aaron, and his sons, and the other ram was the ram of consecration of them; and out of the basket of unleavened bread one cake of each sort was to be taken, and waved with other things, and burnt, which finished the consecration; but with it was no oath, as in the consecration of the antitypical high priest Christ Jesus, which difference is observed by the apostle, Hebrews 7:21 see Exodus 29:1.