Numbers 8:5. And the LORD* spoke to Moses saying, 6. “Take the Levites from among the children of Israel and cleanse them. 7. And you will do thus to them to cleanse them: Sprinkle purifying water upon them and they will pass a razor over all their flesh and they will wash their clothes, and so make themselves clean. 8. Then they will take a young bull with its grain offering, fine flour mixed with oil, and you will take another young bull for a sin offering. 9. And you will bring the Levites in front of the Tent of Meeting and you will gather the whole assembly of the children of Israel together, 10. and you will bring the Levites before the LORD*, and the children of Israel will put their hands upon the Levites. 11. And Aaron will offer the Levites before the LORD*, a wave offering of the children of Israel, so they can execute the service of the LORD*. 12. And the Levites will lay their hands upon the heads of the bulls and you will offer one, a sin offering, and the other a burnt offering, to the LORD*, to make atonement for the Levites. 13. And you will set the Levites before Aaron and before his sons and offer them for an offering to the LORD*. 14. Thus you will separate the Levites from among the children of Israel and the Levites will be Mine.