And the Lord spake unto Moses At the same time he gave the instructions about the consecration of the Levites, the time of their entrance on their service, and of leaving it, was fixed: saying; as follows.
21
And the Levites purified themselves from sin and washed their clothes, and Aaron offered them as a wave offering before the LORD, and Aaron made atonement for them to cleanse them.
22
And after that the Levites went in to do their service in the tent of meeting before Aaron and his sons; as the LORD had commanded Moses concerning the Levites, so they did to them.