Exodus 20:18–20

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