Numbers 18:4
They are to join you and guard the tent of meeting, doing all the work at the tent, but no unauthorized person may come near you.
Numbers 1:51
Whenever the tabernacle is to move, the Levites are to take it down, and whenever it is to stop at a campsite, the Levites are to set it up. Any unauthorized person who comes near it must be put to death.
Numbers 3:10
You are to appoint Aaron and his sons to carry out their priestly responsibilities, but any unauthorized person who comes near the sanctuary must be put to death.”
1 Samuel 6:19
God struck down the men of Beth-shemesh because they looked inside the ark of the Lord.
2 Samuel 6:6-7
When they came to Nacon’s threshing floor, Uzzah reached out to the ark of God and took hold of it because the oxen had stumbled.