Numbers 8:21
The Levites purified themselves from sin, and they washed their clothes; and Aaron offered them for a wave offering before the LORD; and Aaron made atonement for them to cleanse them.
Numbers 8:7
You shall do this to them, to cleanse them: sprinkle the water of cleansing on them, let them shave their whole bodies with a razor, and let them wash their clothes, and cleanse themselves.
Numbers 8:11-13
and Aaron shall offer the Levites before the LORD for a wave offering, on the behalf of the children of Israel, that it may be theirs to do the service of the LORD.
Numbers 8:15
"After that, the Levites shall go in to do the service of the Tent of Meeting: and you shall cleanse them, and offer them as a wave offering.
Numbers 3:12
"Behold, I have taken the Levites from among the children of Israel instead of all the firstborn who open the womb among the children of Israel; and the Levites shall be mine:
Numbers 19:12
the same shall purify himself with water on the third day, and on the seventh day he shall be clean: but if he doesn't purify himself the third day, then the seventh day he shall not be clean.
Numbers 19:19
and the clean person shall sprinkle on the unclean on the third day, and on the seventh day: and on the seventh day he shall purify him; and he shall wash his clothes, and bathe himself in water, and shall be clean at evening.