Matthew Henry on Leviticus 8:1-13
God had given Moses orders to consecrate Aaron and his sons to the priests' office, when he was with him the first time upon mount Sinai, Ex. 28 and Exo 29:1, where we have also the particular instructions he had how to do it. Now here we have,
I. The orders repeated. What was there commanded to be done is here commanded to be done now, Lev 8:2, Lev 8:3. The tabernacle was newly set up, which, without the priests, would be as a candlestick without a candle; the law concerning sacrifices was newly given, but could not be observed without priests; for, though Aaron and his sons had been nominated to the office, they could not officiate, till they were consecrated, which yet must not be done ti…
Read the whole note in the consoleJamieson-Fausset-Brown on Leviticus 8:6
Moses . . . washed them with water--At consecration they were subjected to entire ablution, though on ordinary occasions they were required, before entering on their duties, only to wash their hands and feet. This symbolical ablution was designed to teach them the necessity of inward purity, and the imperative obligation on those who bore the vessels and conducted the services of the sanctuary to be holy.
Adam Clarke on Leviticus 8:2
Take Aaron and his sons - The whole subject of this chapter has been anticipated in the notes, Exo 28:1 (note), etc., and Exo 29:1 (note), etc., in which all the sacrifices, rites, and ceremonies have been explained in considerable detail; and to those notes the reader is referred. It is only necessary to observe that Aaron and his sons were not anointed until now. Before, the thing was commanded; now, first performed.
John Gill on Leviticus 8:6
And Moses brought Aaron and his sons,.... To the laver which was in the court of the tabernacle
and washed them with water; to show that they should be clean that bear the vessels of the Lord, and offer the sacrifices of the people; all that are in public office in the house of God ought to have both clean hands and a pure heart, to hold the mystery of the faith in a pure conscience, and to be of a pure and holy conversation; and indeed all that are made kings and priests to God, as all the saints are, they are washed from their sins in the blood of Jesus, Revelation 1:5.