Deuteronomy 4:11
And you came near and stood at the foot of the mountain; and the mountain burned with fire unto the midst of heaven, with darkness, clouds, and thick darkness.
Deuteronomy 5:23
And it came to pass, when you heard the voice out of the midst of the darkness, (for the mountain did burn with fire,) that you came near unto me, even all the heads of your tribes, and your elders;
Exodus 19:16-18
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 exceedingly loud; so that all the people that were in the camp trembled.
Exodus 20:18-19
And all the people saw the thunderings, and the lightnings, and the noise of the trumpet, and the mountain smoking: and when the people saw it, they moved, and stood far off.
Hebrews 12:18-19
For you are not come unto the mount that might be touched, and that burned with fire, nor unto blackness, and darkness, and tempest,