Exodus 19:16-18

16On the morning of the second day, there was thunder and lightning with a heavy cloud over the mountain, and a very loud blast from a ram’s horn ⌞was heard⌟. All the people in the camp shook with fear.

17Then Moses led the people out of the camp to meet with God, and they stood at the foot of the mountain.

18All of Mount Sinai was covered with smoke because the Lord had come down on it in fire. Smoke rose from the mountain like the smoke from a kiln, and the whole mountain shook violently.