Exodus 20:18-20

Now all the people witnessed the thunderings, the lightning flashes, the sound of the trumpet, and the mountain smoking; and when the people saw it, they trembled and stood afar off. Then they said to Moses, “You speak with us, and we will hear; but let not God speak with us, lest we die.” And Moses said to the people, “Do not fear; for God has come to test you, and that His fear may be before you, so that you may not sin.”