Numbers 4:20

and they go not in to see when the holy thing is swallowed, that they have died.'

Exodus 19:21

And Jehovah saith unto Moses, 'Go down, protest to the people, lest they break through unto Jehovah to see, and many of them have fallen;

1 Samuel 6:19

And He smiteth among the men of Beth-Shemesh, for they looked into the ark of Jehovah, yea, He smiteth among the people seventy men -- fifty chief men; and the people mourn, because Jehovah smote among the people -- a great smiting.

Leviticus 10:2

and fire goeth out from before Jehovah, and consumeth them, and they die before Jehovah.

Numbers 4:15

And Aaron hath finished -- his sons also -- covering the sanctuary, and all the vessels of the sanctuary, in the journeying of the camp, and afterwards do the sons of Kohath come in to bear it, and they do not come unto the holy thing, that they have died; these things are the burden of the sons of Kohath in the tent of meeting.

Numbers 4:19

but this do to them, and they have lived, and do not die in their drawing nigh the holy of holies: -- Aaron and his sons go in, and have set them, each man to his service, and unto his burden,

Hebrews 10:19-20

Having, therefore, brethren, boldness for the entrance into the holy places, in the blood of Jesus,

Revelation 11:19

And opened was the sanctuary of God in the heaven, and there was seen the ark of His covenant in His sanctuary, and there did come lightnings, and voices, and thunders, 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 Aaron hath finished -- his sons also -- covering the sanctuary, and all the vessels of the sanctuary, in the journeying of the camp, and afterwards do the sons of Kohath come in to bear it, and they do not come unto the holy thing, that they have died; these things are the burden of the sons of Kohath in the tent of meeting.
Exodus 19:21
And Jehovah saith unto Moses, 'Go down, protest to the people, lest they break through unto Jehovah to see, and many of them have fallen;
Leviticus 10:2
and fire goeth out from before Jehovah, and consumeth them, and they die before Jehovah.
1 Samuel 6:19
And He smiteth among the men of Beth-Shemesh, for they looked into the ark of Jehovah, yea, He smiteth among the people seventy men -- fifty chief men; and the people mourn, because Jehovah smote among the people -- a great smiting.
Hebrews 10:19
Having, therefore, brethren, boldness for the entrance into the holy places, in the blood of Jesus,
Revelation 11:19
And opened was the sanctuary of God in the heaven, and there was seen the ark of His covenant in His sanctuary, and there did come lightnings, and voices, and thunders, and an earthquake, and great hail.