Parallel
Numbers 8:21
Brenton's English Septuagint · Berean Standard Bible
So the Levites purified themselves and washed their garments; and Aaron presented them as a gift before the Lord, and Aaron made atonement for them to purify them.
The Levites purified themselves and washed their clothes, and Aaron presented them as a wave offering before the LORD. Aaron also made atonement for them to cleanse them.