Numbers 8:7-9

International Standard Version

⁷ This is what you are to do for them in order to purify them: Sprinkle purifying water over them, have them shave their skin, and then have them wash their garments, and they will be purified. ⁸ They are to take a young bull along with its meal offering made of flour mixed with oil. Then you are to take a second young bull as a sin offering. ⁹ Assemble the descendants of Levi in front of the appointed place of meeting, and assemble the whole congregation of Israel, too.