Numbers 4:16

13 They shall take away the ashes from the altar, and spread a purple cloth thereon:

14 and they shall put on it all the vessels of it, with which they minister about it, the fire pans, the flesh-hooks, and the shovels, and the basins, all the vessels of the altar; and they shall spread on it a covering of sealskin, and put in the poles of it.

15 When Aaron and his sons have made an end of covering the sanctuary, and all the furniture of the sanctuary, as the camp is set forward; after that, the sons of Kohath shall come to bear it: but they shall not touch the sanctuary, lest they die. These things are the burden of the sons of Kohath in the tent of meeting.

16 The charge of Eleazar the son of Aaron the priest shall be the oil for the light, and the sweet incense, and the continual meal-offering, and the anointing oil, the charge of all the tent, and of all that therein is, the sanctuary, and the furniture of it.

17 Yahweh spoke to Moses and to Aaron, saying,

18 Don`t cut off the tribe of the families of the Kohathites from among the Levites;

19 but thus do to them, that they may live, and not die, when they approach to the most holy things: Aaron and his sons shall go in, and appoint them everyone to his service and to his burden;