Numbers 4:20

But they shall not go in to see when the holy things are covered, lest they die.

Exodus 19:21

And the LORD said to Moses, Go down, charge the people, lest they break through to the LORD to gaze, and many of them perish.

1 Samuel 6:19

And he smote the men of Beth-shemesh, because they had looked into the ark of the LORD, even he smote of the people fifty thousand and seventy men: and the people lamented, because the LORD had smitten many of the people with a great slaughter.

Leviticus 10:2

And there went out fire from the LORD, and devoured them, and they died before the LORD.

Numbers 4:15

And when Aaron and his sons have made an end of covering the sanctuary, and all the vessels of the sanctuary, as the camp is to move forward; after that, the sons of Kohath shall come to bear it: but they shall not touch any holy thing, lest they die. These things are the burden of the sons of Kohath in the tabernacle of the congregation.

Numbers 4:19

But thus do to them, that they may live, and not die, when they approach to the most holy things: Aaron and his sons shall go in, and appoint them every one to his service and to his burden:

Hebrews 10:19-20

Having therefore, brethren, boldness to enter into the holiest by the blood of Jesus,

Revelation 11:19

And the temple of God was opened in heaven, and there was seen in his temple the ark of his testament: and there were lightnings, and voices, and thunderings, and an earthquake, and great hail.

Treasury of Scripture Knowledge

Summary

But they shall not go in to see when the holy things are covered, lest they die.

Bible References

They shall

Numbers 4:15
And when Aaron and his sons have made an end of covering the sanctuary, and all the vessels of the sanctuary, as the camp is to move forward; after that, the sons of Kohath shall come to bear it: but they shall not touch any holy thing, lest they die. These things are the burden of the sons of Kohath in the tabernacle of the congregation.
Exodus 19:21
And the LORD said to Moses, Go down, charge the people, lest they break through to the LORD to gaze, and many of them perish.
Leviticus 10:2
And there went out fire from the LORD, and devoured them, and they died before the LORD.
1 Samuel 6:19
And he smote the men of Beth-shemesh, because they had looked into the ark of the LORD, even he smote of the people fifty thousand and seventy men: and the people lamented, because the LORD had smitten many of the people with a great slaughter.
Hebrews 10:19
Having therefore, brethren, boldness to enter into the holiest by the blood of Jesus,
Revelation 11:19
And the temple of God was opened in heaven, and there was seen in his temple the ark of his testament: and there were lightnings, and voices, and thunderings, and an earthquake, and great hail.