Deuteronomy 4:11
And ye came near and stood under the mountain, and the mountain burned with fire unto the midst of the heavens, with darkness, clouds, and thick darkness.
Deuteronomy 5:23
And it came to pass when ye heard the voice out of the midst of the darkness and saw the mountain that burned with fire that ye came near unto me, even all the princes of your tribes and your elders;
Exodus 19:16-18
And it came to pass on the third day when the morning came, that there were thunders and lightnings and a thick cloud upon the mount and the voice of the shofar exceeding 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 trembled and stood afar off.
Hebrews 12:18-19
For ye are not come unto the mount that might be touched and that burned with fire nor unto blackness and darkness and tempest