Numbers 8:13-15

Tree of Life Version

¹³ Have the Levites stand before Aaron and his sons and present them as a wave offering to Adonai. ¹⁴ In this way you are to set apart the Levites from Bnei-Yisrael to be Mine. ¹⁵ After you have purified them and presented them as a wave offering, the Levites will come to do their work at the Tent of Meeting.