Bamidbar 8:20-22 Orthodox Jewish Bible (OJB)
20 And Moshe, and Aharon, and Kol Adat Bnei Yisroel, did with the Levi’im according unto all that Hashem commanded Moshe concerning the Levi’im, so did the Bnei Yisroel unto them.
21 And the Levi’im purified themselves, and they immersed their clothes; and Aharon offered them as a tenufah before Hashem; and Aharon made kapporah for them to make them tahor.
22 And after that went the Levi’im in to do their Avodah in the Ohel Mo’ed before Aharon, and before his Banim; just as Hashem had commanded Moshe concerning the Levi’im, so did they with them.
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.