Numbers 8:20-22 Evangelical Heritage Version (EHV)
20 Moses, Aaron, and the entire community of the people of Israel did for the Levites just as they had been told. The Israelites did for them everything that the Lord commanded Moses in regard to the Levites. 21 The Levites purified themselves and washed their clothing. Aaron offered them as a wave offering before the Lord and made atonement for them to purify them. 22 After that, the Levites went to do their work at the Tent of Meeting in the presence of Aaron and his sons. Just as the Lord had commanded Moses about the Levites, that is exactly what they did for them.