Numbers 8:20-22 Living Bible (TLB)
20 So Moses and Aaron and all the people of Israel dedicated the Levites, carefully following Jehovah’s instructions to Moses. 21 The Levites purified themselves and washed their clothes, and Aaron presented them to the Lord in a gesture of offering. He then performed the rite of atonement over them to purify them. 22 After that they went into the Tabernacle as assistants to Aaron and his sons; everything was done just as the Lord had commanded Moses.