Numbers 8:21-23

Darby Translation

²¹ And the Levites purified themselves from sin, and they washed their garments; and Aaron offered them as a wave-offering before Jehovah; and Aaron made atonement for them to cleanse them.

²² And afterwards the Levites came in to perform their service in the tent of meeting before Aaron, and before his sons; as Jehovah had commanded Moses concerning the Levites, so did they to them.

²³ And Jehovah spoke to Moses, saying,