Then he must take off his garments, put on other clothes, and carry the ashes outside the camp to a ceremonially clean place.
Hitherto we have had the instructions which Moses was directed to give to the people concerning the sacrifices; but here begin the instructions he was to give to the priests; he must command Aaron and his sons, Lev 6:9. The priests were rulers in the house of God, but these rulers must be ruled; and those that had the command of others must themselves be commanded.
Commenting on Leviticus 6:8-13
And he shall put off his garments,.... Those before mentioned, he is said to put on: and put on other garments; not common garments or lay-habits, what the priests wore when they were not on duty; for, as Ben Gersom says, these were priestly garments, though meaner than the first, or those that were put off: and so Jarchi says, they were worse than they...
And put on other garments - The priests approached the altar in their holiest garments; when carrying the ashes, etc., from the altar, they put on other garments, the holy garments being only used in the holy place. Clean place - A place where no dead carcasses, dung, or filth of any kind was laid; for the ashes were holy, as being the remains of...