Deuteronomy 4:11
"When you approached and stood at the foot of the mountain a mountain that was blazing with fire at its core while the sky was covered with thick, dark clouds
Deuteronomy 5:23
When you heard the voice from the darkness while the mountain was blazing, all the leaders and elders of your tribes came to me and said:
Exodus 19:16-18
When morning came on the third day, there was thunder and lightning, with a heavy cloud over the mountain, and the very loud sound of a ram's horn. All the people in the camp trembled.
Exodus 20:18-19
All the people experienced the thunder and lightning, the sound of the ram's horn, and the smoking mountain. And as the people experienced it, they trembled and stood at a distance.
Hebrews 12:18-19
You have not come to something that can be touched, to a blazing fire, to darkness, to gloom,