Exodus 20:18-20

18 All the people perceived the thunderings, the lightnings, the sound of the trumpet, and the mountain smoking. When the people saw it, they trembled, and stayed at a distance.  19 They said to Moses, "Speak with us yourself, and we will listen; but don't let God speak with us, lest we die."

20 Moses said to the people, "Don't be afraid, for God has come to test you, and that his fear may be before you, that you won't sin."