Exodus 19:18

Now Mount Sinai was wrapped in smoke because the Lord had descended on it in fire . The smoke of it went up like the smoke of a kiln , and the whole mountain trembled greatly .

Mount Sinai was covered with smoke, because the Lord descended on it in fire. The smoke billowed up from it like smoke from a furnace, and the whole mountain trembled violently.

And mount Sinai was altogether on a smoke, because the Lord descended upon it in fire : and the smoke thereof ascended as the smoke of a furnace, and the whole mount quaked greatly.