Numbers 8:21
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.
Numbers 8:7
Thus you shall do to them to cleanse them: sprinkle the water of purification upon them, and let them go with a razor over all their body, and wash their clothes and cleanse themselves.
Numbers 8:11-13
and Aaron shall offer the Levites before the LORD as a wave offering from the people of Israel, that they may do the service of the LORD.
Numbers 8:15
And after that the Levites shall go in to serve at the tent of meeting, when you have cleansed them and offered them as a wave offering.
Numbers 3:12
"Behold, I have taken the Levites from among the people of Israel instead of every firstborn who opens the womb among the people of Israel. The Levites shall be mine,
Numbers 19:12
He shall cleanse himself with the water on the third day and on the seventh day, and so be clean. But if he does not cleanse himself on the third day and on the seventh day, he will not become clean.
Numbers 19:19
And the clean person shall sprinkle it on the unclean on the third day and on the seventh day. Thus on the seventh day he shall cleanse him, and he shall wash his clothes and bathe himself in water, and at evening he shall be clean.