Numbers 8:20-22

20And MosesH4872 and AaronH175, and all the assemblyH5712 of the children of IsraelH3478, did to the LevitesH3881 according to all that Jehovah had commandedH6680 MosesH4872 concerning the LevitesH3881: soH3651 did the children of IsraelH3478 to them.

21And the LevitesH3881 purifiedH2891 themselves from sinH2398, and they washedH3526 their garmentsH899; and AaronH175 offered them as a wave-offering before Jehovah; and AaronH175 made atonementH3722 for them to cleanseH2891 them.

22And afterwards the LevitesH3881 cameH935 in to perform their serviceH5656 in the tentH168 of meetingH4150 before AaronH175, and before his sonsH1121; as Jehovah had commandedH6680 MosesH4872 concerning the LevitesH3881, soH3651 did they to them.