Hebrews 12:21

and so terrible was the appearance, that Moses said, I am exceedingly afraid and trembling:

Hebrews 12:18-19

For ye have not approached the mountain that could only be groped for, and that burned with fire, and the thick cloud, and the darkness, and the tempest,

Revelation 4:1

AFTER these things I beheld, and, lo! a door was opened in heaven, and a voice, the first which I heard, as of a trumpet, speaking to me, said, Come up hither, and I will shew thee what things will be after these.

Revelation 4:5

And out of the throne issued forth lightnings, and thunder, and loud voices; and seven lamps of fire burned before the throne, which are the seven spirits of God.

Revelation 8:5

And the angel took the censer, and filled it from the fire of the altar, and cast it upon the earth: and there were voices, and thunders, and lightnings, and an earthquake.

Revelation 11:19

And the temple of God was opened in the heaven, and there appeared the ark of his covenant in his temple: and there were lightnings, and voices, and thunders, and earthquake, and a great hail.

Revelation 1:10

I was [rapt] in spirit on the Lord's day, and heard behind me a great voice as of a trumpet,

Treasury of Scripture Knowledge

Summary

And it came to pass on the third day in the morning, that there were thunders and lightnings, and a thick cloud upon the mount, and the voice of the trumpet exceeding loud; so that all the people that was in the camp trembled.

All the people

Bible References

Thunders

Hebrews 12:18
For ye have not approached the mountain that could only be groped for, and that burned with fire, and the thick cloud, and the darkness, and the tempest,
Revelation 4:5
And out of the throne issued forth lightnings, and thunder, and loud voices; and seven lamps of fire burned before the throne, which are the seven spirits of God.
Revelation 8:5
And the angel took the censer, and filled it from the fire of the altar, and cast it upon the earth: and there were voices, and thunders, and lightnings, and an earthquake.
Revelation 11:19
And the temple of God was opened in the heaven, and there appeared the ark of his covenant in his temple: and there were lightnings, and voices, and thunders, and earthquake, and a great hail.

All the people

Hebrews 12:21
and so terrible was the appearance, that Moses said, I am exceedingly afraid and trembling: