And the Levites were purified,.... From sin, by the sprinkling of the sin water, or water of purification on them, Numbers 8:7;
and they washed their clothes; that they might have no defilement about them, neither in their bodies, nor in their garments:
and Aaron offered them [as] an offering before the Lord; a wave offering, as in Numbers 8:11;
and Aaron made an atonement for them to cleanse them; by offering the sacrifices for them, Numbers 8:12.