Hebrews 10:19-20

Therefore, Brothers, since we may enter the Sanctuary with confidence, in virtue of the blood of Jesus,

Revelation 11:19

Then the Temple of God in Heaven was opened, and the Ark containing his Covenant was seen in his Temple; and there followed 'flashes of lightning, cries, peals of thunder,' an earthquake, and 'a great storm of 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

Hebrews 10:19
Therefore, Brothers, since we may enter the Sanctuary with confidence, in virtue of the blood of Jesus,
Revelation 11:19
Then the Temple of God in Heaven was opened, and the Ark containing his Covenant was seen in his Temple; and there followed 'flashes of lightning, cries, peals of thunder,' an earthquake, and 'a great storm of hail.'