Numbers 8:21-23

New American Standard Bible

^21 (A)The Levites, too, purified themselves from sin and washed their clothes; and Aaron presented them as a wave offering before the Lord. Aaron also made atonement for them to cleanse them. ²² Then after that the Levites went in to perform their service in the tent of meeting before Aaron and his sons; just as the Lord had commanded Moses concerning the Levites, so they did to them.

Retirement for the Levites

²³ Now the Lord spoke to Moses, saying,