'Thick Cloud' in the Bible

And LORD said to Moses, Lo, I come to thee in a thick cloud, that the people may hear when I speak with thee, and may also believe thee forever. And Moses told the words of the people to LORD.

And it came to pass on the third day, when it was morning, that there were thunders and lightnings, and a thick cloud upon the mount, and the voice of an exceedingly loud trumpet. And all the people who were in the camp trembled.

And he made darkness pavilions round about him, gathering of waters, thick clouds of the skies.

Thick clouds are a covering to him, so that he does not see, and he walks on the vault of heaven.

He binds up the waters in his thick clouds, and the cloud is not rent under them.

Yea, he loads the thick cloud with moisture. He spreads abroad the cloud of his lightning,

He made darkness his hiding-place, his pavilion round about him, darkness of waters, thick clouds of the skies.

At the brightness before him his thick clouds passed, hailstones and coals of fire.

I have blotted out, as a thick cloud, thy transgressions, and, as a cloud, thy sins. Return to me, for I have redeemed thee.