Numbers 8:7-9

Young's Literal Translation

⁷ `And thus thou dost to them to cleanse them: sprinkle upon them waters of atonement, and they have caused a razor to pass over all their flesh, and have washed their garments, and cleansed themselves,

⁸ and have taken a bullock, a son of the herd, and its present, flour mixed with oil, -- and a second bullock a son of the herd thou dost take for a sin-offering,

⁹ and thou hast brought near the Levites before the tent of meeting, and thou hast assembled the whole company of the sons of Israel,