Deuteronomy 4:11
And ye came near and stood under the mountain; and the mountain burned with fire to the heart of heaven, with darkness, clouds, and obscurity.
Deuteronomy 5:23
And it came to pass, when ye heard the voice from the midst of the darkness, and the mountain burned with fire, that ye came near to me, all the heads of your tribes, and your elders;
Exodus 19:16-18
And it came to pass on the third day, when it was morning, that there were thunders and lightnings and a heavy cloud on the mountain, and the sound of the trumpet exceeding loud; and the whole people that was in the camp trembled.
Exodus 20:18-19
And all the people saw the thunderings, and the flames, and the sound 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 have not come to the mount that might be touched and was all on fire, and to obscurity, and darkness, and tempest,