Exodus 20:18-20

All the people perceived the thunder and the lightning flashes and the sound of the trumpet and the mountain smoking; and when the people saw it, they trembled and stood at a distance. Then they said to Moses, “Speak to us yourself and we will listen; but let not God speak to us, or we will die.” Moses said to the people, “Do not be afraid; for God has come in order to test you, and in order that the fear of Him may remain with you, so that you may not sin.”