Numbers 8:20-22

International Standard Version

²⁰ So Moses and Aaron and the Israelis did this on behalf of the descendants of Levi. The Israelis did everything that the Lord commanded concerning the descendants of Levi. ²¹ The descendants of Levi therefore purified themselves, washed their clothes, and then Aaron presented them as wave offerings to the Lord. Aaron provided atonement for them to purify them. ²² After this, the descendants of Levi entered into their work of service at the appointed place, in the presence of Aaron and his sons. They did everything that the Lord commanded Moses concerning the descendants of Levi.