They are to join you and attend to the duties of the Tent of Meeting, doing all the work at the Tent; but no outsider may come near you.
KJV
And they shall be joined unto thee, and keep the charge of the tabernacle of the congregation, for all the service of the tabernacle: and a stranger shall not come nigh unto you.
ASV
And they shall be joined unto thee, and keep the charge of the tent of meeting, for all the service of the Tent: and a stranger shall not come nigh unto you.