Bible: Ex. 19:16, 18

19:16 On 1  the third day in the morning there was thunder and lightning and a dense 2  cloud on the mountain, and the sound of a very loud 3  horn; 4  all the people who were in the camp trembled. 19:18 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, 5  and the whole mountain shook 6  violently.

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