"And you shall stand the Levites before Aaron and his sons, and then offer them like a wave offering to the LORD.
Numbers 8:13
Surrounding context
8:12 Then the Levites shall lay their hands on the heads of the young bulls, and you shall offer one as a sin offering and the other as a burnt offering to the LORD, to make atonement for the Levites.
8:13 "And you shall stand the Levites before Aaron and his sons, and then offer them like a wave offering to the LORD.
8:14 Thus you shall separate the Levites from among the children of Israel, and the Levites shall be Mine.