TSK
Treasury of Scripture Knowledge references in NET.
On the third day in the morning there was thunder and lightning and a dense cloud on the mountain, and the sound of a very loud horn; all the people who were in the camp trembled.
All the people were seeing the thundering and the lightning, and heard the sound of the horn, and saw the mountain smoking– and when the people saw it they trembled with fear and kept their distance.
He made the sky sink as he descended; a thick cloud was under his feet.
For you have not come to something that can be touched, to a burning fire and darkness and gloom and a whirlwind