Numbers 1:48-50

New Century Version

⁴⁸ the Lord had told Moses: ⁴⁹ “Do not count the tribe of Levi or include them with the other Israelites. ⁵⁰ Instead put the Levites in charge of the Holy Tent of the Agreement and everything that is with it. They must carry the Holy Tent and everything in it, and they must take care of it and make their camp around it.