Deuteronomy 5:23

Then, when you heard the voice from the midst of the darkness while the mountain was ablaze, all your tribal leaders and elders approached me.

Exodus 20:18-19

All the people were seeing the thundering and the lightning, and heard the sound of the horn, and saw the mountain smoking -- and when the people saw it they trembled with fear and kept their distance.

Hebrews 12:18-21

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

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