Numbers 18:3
They are to fulfill their duties to you and their responsibilities for the tent. However they must not have any contact with sacred objects in the Holy Place or with the altar. If they do, both they and you will be put to death.
Numbers 4:15
When Aaron and his sons finished covering the holy things and the camp is ready to move, the Kohathites will come to carry all the holy articles. They must never touch the holy things, or they will die. The Kohathites will carry all the things from the tent of meeting.
Numbers 3:25
The Gershonites were in charge of the inner tent, the outer tent and cover, the screen for the entrance to the tent of meeting,
Numbers 3:31
They were in charge of the Ark, the table, the lamp stand, the altars, the utensils used in the holy place, and the screen. They took care of all these things.
Numbers 3:36
It was the duty of the Merarites to be in charge of the framework of the inner tent, the crossbars, posts, sockets, and all the equipment. They took care of these things.
Numbers 4:19-20
This is what you must do so that they will not die when they come near the most holy things: Aaron and his sons will go into the holy place and tell each man what he will do and what he will carry.
Numbers 16:40
He followed Jehovah's command given through Moses. The copper-covered altar will remind Israel that no one but a descendant of Aaron may come near to burn incense to Jehovah. Everyone else will die like Korah and his followers.
Numbers 1:51
When the tent is to be moved, the Levites will take it down. When we camp, they will set it up. Anyone else who comes near the tent will be put to death.
Numbers 18:7
Only you and your sons may do the work of priests, everything done at the altar and under the canopy. This is my gift to you: You may serve me as priests. Anyone else who comes near the holy place to do this work must die.