Deuteronomy 4:11

4:11 You approached and stood at the foot of the mountain, a mountain ablaze to the sky above it and yet dark with a thick cloud.

Deuteronomy 5:23

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 9:23

9:23 When Moses extended his staff toward the sky, the Lord sent thunder and hail, and fire fell to the earth; so the Lord caused hail to rain down on the land of Egypt.

Exodus 19:18

19:18 Now Mount Sinai was completely covered with smoke because the Lord had descended on it in fire, and its smoke went up like the smoke of a great furnace, and the whole mountain shook violently.

Hebrews 12:18

12:18 For you have not come to something that can be touched, to a burning fire and darkness and gloom and a whirlwind