8 They are to take care of all the furnishings of the tent of meeting, fulfilling the obligations of the Israelites by doing the work of the tabernacle.

Read Numbers 3:8 Using Other Translations

And they shall keep all the instruments of the tabernacle of the congregation, and the charge of the children of Israel, to do the service of the tabernacle.
They shall guard all the furnishings of the tent of meeting, and keep guard over the people of Israel as they minister at the tabernacle.
They will also maintain all the furnishings of the sacred tent, serving in the Tabernacle on behalf of all the Israelites.