Parallel
Numbers 8:15
King James Version (1769 Blayney revision, with Apocrypha) · Berean Standard Bible
And after that shall the Levites go in to do the service of the tabernacle of the congregation: and thou shalt cleanse them, and offer them for an offering.
After you have cleansed them and presented them as a wave offering, they may come to serve at the Tent of Meeting.