§ 02 · King James Bible
Numbers 8:21
And the Levites were purified, and they washed their clothes; and Aaron offered them as an offering before the LORD; and Aaron made an atonement for them to cleanse them.
Simple English
The Levites got cleaned and washed their clothes. Aaron presented them to God as a sacrifice and cleansed them with atonement.
* Work in progress - there may be occasional inaccuracies