Exodus 19:21

but they shall not go in to see the holy objects even for a moment, or they will die.”

I was standing between Yahweh and you at that time, to declare to you the word of Yahweh; for you were afraid because of the fire and did not go up the mountain. He said,

Then He struck down some of the men of Beth-shemesh because they had looked into the ark of Yahweh. He struck down of all the people, 50,070 men, and the people mourned because Yahweh had struck the people with a great slaughter.

For you have not come to a mountain that can be touched and to a blazing fire, and to darkness and gloom and whirlwind,