Exodus 19:18-20 New English Translation (NET Bible)
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,[a] and the whole mountain shook[b] violently. 19 When the sound of the horn grew louder and louder,[c] Moses was speaking[d] and God was answering him with a voice.[e]
20 The Lord came down on Mount Sinai, on the top of the mountain, and the Lord summoned Moses to the top of the mountain, and Moses went up.