Numbers 8:20-22 Douay-Rheims 1899 American Edition (DRA)
20 And Moses and Aaron and all the multitude of the children of Israel did with the Levites all that the Lord had commanded Moses:
21 And they were purified, and washed their garments. And Aaron lifted them up in the sight of the Lord, and prayed for them,
22 That being purified they might go into the tabernacle of the covenant to do their services before Aaron and his sons. As the Lord had commanded Moses touching the Levites, so was it done.
Numbers 8:20-22 New International Version (NIV)
20 Moses, Aaron and the whole Israelite community did with the Levites just as the Lord commanded Moses. 21 The Levites purified themselves and washed their clothes. Then Aaron presented them as a wave offering before the Lord and made atonement for them to purify them. 22 After that, the Levites came to do their work at the tent of meeting under the supervision of Aaron and his sons. They did with the Levites just as the Lord commanded Moses.