Targum Jonathan on Exodus
And all the mount of Sinai was in flame; for the heavens had overspread it, and He was revealed over it in flaming fire, and the smoke went up as the smoke of a furnace, and all the mountain quaked greatly.
Targum Jerusalem
And all mount Sinai sent up smoke, because the glory of the Shekinah of the Lord was revealed upon it in flame of fire.