Numbers 4:16-20

16Eleazar, who is the son of Aaron the priest, must keep the oil for the light. He must keep the incense and the grain offering. He must keep the special oil. The special oil is a mark on everything that God chooses. Eleazar must take care of the whole Tent of Meeting. He must work with God's Holy Tent and with everything in it.’

17Then the Lord said to Moses and Aaron,

18‘You must not cause the end of Kohath's clan from among the Levites.

19Do not let the men in that clan die. That will happen if they come near to the most holy things. You must do this: Aaron and his sons must go into the Tent of Meeting. They will tell each man the work that he must do. And they must tell each man the things that he must carry.

20But the men from Kohath's clan must not look at anything that is holy, even for a moment. If they do look at those things, they will die.’