Numbers 4:15

15When the people are ready to leave, the men from Kohath's clan must be ready to carry all those things. But they must wait until Aaron and his sons have covered all the holy things of the tabernacle. The men from Kohath's clan must not touch the holy things. They will die if they touch them. Those are the jobs of Kohath's clan. They must carry the things from the Tent of Meeting when the Israelites travel.