Matthew Poole and continuators on Leviticus 9:7

7 And Moses said unto Aaron, Go unto the altar and offer thy sin-offering and thy burnt-offering, and make an atonement for thy self, and for the people : and offer the offering of the people, and make an atonement for them, as the LORD commanded.

Moses had hitherto sacrificed, but now he resigneth his work to Aaron and actually gives him that commission which from God he had received for him.

The order is very observable, first for thy self, otherwise thou art unfit to do it for the people. Hereby God would teach us, both the deficiency of this Priesthood and the absolute necessity of an higher and better Priest, Heb. 7. 26, 27. and how important and needful it is that Gods Ministers should be in the grace and favour of God themselves, that their ministrations may be acceptable to God and profitable to the people.

Marginal references: Heb. 5. 3.