Numbers 18:4
And let them be by thee and wait on the tabernacle of witness, and on all the service of the tabernacle, and let no stranger come nigh unto you.
Numbers 1:51
And when the tabernacle goeth forth, the Levites shall take it down: and when the tabernacle is pitched, they shall set it up: for if any stranger come near, he shall die.
Numbers 3:10
And thou shalt appoint Aaron and his sons to wait on their priests' office: and the stranger that cometh nigh shall die for it."
1 Samuel 6:19
And he plagued the men of Bethshemesh, because they had seen the ark of the LORD. And he slew of the people fifty thousand and three score and ten persons. And the people lamented, because the LORD had slain so great a slaughter of them.
2 Samuel 6:6-7
And when they came to Nacon's threshing floor, Uzzah put his hand to the ark of God and held it, for the oxen stumbled.