Numbers 18:4
They are to work with you and fulfill their responsibilities for all the service in the tent. No unqualified person may work with you.
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 3:10
Appoint Aaron and his sons to serve as priests. Anyone else who tries to do the priests' duties must be put to death.
1 Samuel 6:19
Some of the men of Bethshemesh looked inside the Ark. Jehovah killed seventy of them. This made the people of Bethshemesh very sad.
2 Samuel 6:6-7
As they came to the threshing place of Nacon, the oxen stumbled, and Uzzah reached out and took hold of the Ark of the Covenant.