Numbers 8:20-22

New Century Version

²⁰ So Moses, Aaron, and all the Israelites obeyed and did with the Levites what the Lord commanded Moses. ²¹ The Levites made themselves clean and washed their clothes. Then Aaron presented them as an offering to the Lord. He also removed their sins so they would be pure. ²² After that, the Levites came to the Meeting Tent to work, and Aaron and his sons told them what to do. They did with the Levites what the Lord commanded Moses.