Parallel
Exodus 19:18
Brenton's English Septuagint · Berean Standard Bible
The mount of Sina was altogether on a smoke, because God had descended upon it in fire; and the smoke went up as the smoke of a furnace, and the people were exceedingly amazed.
Mount Sinai was completely enveloped in smoke, because the LORD had descended on it in fire. And the smoke rose like the smoke of a furnace, and the whole mountain quaked violently.