Numbers 8:13 BBE

¹¹  And Aaron is to give the Levites to the Lord as a wave offering from the children of Israel, so that they may do the Lord's work.

¹²  And the Levites are to put their hands on the heads of the oxen, and one of the oxen is to be offered for a sin-offering and the other for a burned offering to the Lord to take away the sin of the Levites.

¹³  Then the Levites are to be put before Aaron and his sons, to be offered as a wave offering to the Lord.

¹⁴  So you are to make the Levites separate from the children of Israel, and the Levites will be mine.

¹⁵  After that, the Levites will go in to do whatever has to be done in the Tent of meeting; you are to make them clean and give them as a wave offering.