On the third day in the morning there was thunder and lightning and a dense cloud on the mountain, and the sound of a very loud horn; all the people who were in the camp trembled.
Now Mount Sinai was completely covered with smoke because the Lord had descended on it in fire, and its smoke went up like the smoke of a great furnace, and the whole mountain shook violently.
Then the temple of God in heaven was opened and the ark of his covenant was visible within his temple. And there were flashes of lightning, roaring, crashes of thunder, an earthquake, and a great hailstorm.