And thou shall put them on Aaron thy brother, and his sons with him,.... And this putting on of their garments by Moses, under the authority of God, was a solemn investiture of them with the priestly office also; for from henceforward they had a right to exercise it, having those garments on, without which they were never to officiate: and shall anoint them; with the anointing oil, of which afterwards a particular account is given, and how to be made, and for what use, Exo 30:22, typical of the holy graces of the Spirit of God: and consecrate them; the consecration of them was by investing them with their garments, and by anointing them with oil; for this phrase does not intend the whole of their consecration, only another branch of it, and may be literally rendered, "fill their hand" (p); that is, with sacrifices to be offered up by them, see Exo 29:1. and sanctify them; by all this, set them apart, and devote them to the sacred office of priesthood: that they may minister unto me in the priest's office; by offering sacrifices for the people, burning incense, and doing other things relative to the office. (p) "et implebis manum eorum", Montanus, Vatablus, Tigurine version, Fagius, Piscator.