Numbers 8:7-9

Amplified Bible, Classic Edition

⁷ And thus you shall do to them to cleanse them: sprinkle the water of purification [water to be used in case of sin] upon them, and let them pass a razor over all their flesh and wash their clothes and cleanse themselves.^(A)

⁸ Then let them take a young bull and its cereal offering of fine flour mixed with oil, and another young bull you shall take for a sin offering.

⁹ You shall present the Levites before the Tent of Meeting, and you shall assemble the whole Israelite congregation.