19:16And 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 exceeding loud; so that all the people that was in the camp trembled.

20:18And 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 removed, and stood afar off.

20:19And they said unto Moses, Speak thou with us, and we will hear: but let not God speak with us, lest we die.

20:20And Moses said unto the people, Fear not: for God is come to prove you, and that his fear may be before your faces, that ye sin not.