Thus you shall do to them to cleanse them: Sprinkle water of purification on them, and let them shave all their body, and let them wash their clothes, and so make themselves clean.
Numbers 8:7
Surrounding context
8:6 "Take the Levites from among the children of Israel and cleanse them ceremonially.
8:7 Thus you shall do to them to cleanse them: Sprinkle water of purification on them, and let them shave all their body, and let them wash their clothes, and so make themselves clean.
8:8 Then let them take a young bull with its grain offering of fine flour mixed with oil, and you shall take another young bull as a sin offering.