Numbers 8:21
The Levites purified themselves and washed their clothes; then Aaron presented
Numbers 8:7
This is what you must do to them for their purification: Sprinkle them with the purification water.
Numbers 8:11-13
Aaron is to present the Levites before the Lord as a presentation offering from the Israelites, so that they may perform the Lord’s work.
Numbers 8:15
After that the Levites may come to serve at the tent of meeting, once you have ceremonially cleansed them and presented them as a presentation offering.
Numbers 3:12
“See, I have taken the Levites from the Israelites in place of every firstborn Israelite from the womb.
Numbers 19:12
He is to purify himself with the water
Numbers 19:19
“The one who is clean is to sprinkle the unclean person on the third day and the seventh day. After he purifies the unclean person on the seventh day, the one being purified must wash his clothes and bathe in water, and he will be clean by evening.