Exodus 19:18-21

18Now the entire Mount Sinai was in smoke, because Adonai had descended upon it in fire. The smoke ascended like the smoke of a furnace. The whole mountain quaked greatly.

19When the sound of the shofar grew louder and louder, Moses spoke, and God answered him with a thunderous sound.

20Then Adonai came down onto Mount Sinai, to the top of the mountain. Adonai called Moses to the top of the mountain, so Moses went up.

21Then Adonai said to Moses, “Go down and warn the people, lest they break through to see Adonai, and many of them die.