NUM 4:15

15 “Then Aaron and his sons have finished covering all these sacred things, the Israeli people will be ready to move [to a new location]. The descendants of Kohath must come and carry all the sacred things to [the next place] where you Israelis will set up your tents. But the descendants of Kohath must not touch any of these sacred items, because they will [immediately] die [if they touch them]. They are the ones who will carry these things, [but they must not touch them].