Exodus 20:18-22

And all the people were watching and hearing the thunder and the lightning flashes, and the sound of the trumpet, and the mountain smoking; and when the people saw it all, they trembled and stood at a distance.

Then they said to Moses, “Speak to us yourself and we will listen; but do not have God speak to us, or we will die!”

However, 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 will not sin.”

So the people stood at a distance, while Moses approached the thick darkness where God was.

Then the Lord said to Moses, “This is what you shall say to the sons of Israel: ‘You yourselves have seen that I have spoken to you from heaven.