'Thick Cloud' in the Bible
And Jehovah said to Moses, Lo, I come to you in a thick cloud, that the people may hear when I speak with you, and believe you forever. And Moses told the words of the people to Jehovah.
And it happened on the third day in the morning, that there were thunders and lightnings, and a thick cloud upon the mountain. And the voice of the trumpet was exceedingly loud, so that all the people in the camp trembled.
And He made darkness coverings around Him, dark waters, thick clouds of the skies.
He binds up the waters in His thick clouds; and the cloud is not torn under them.
He made darkness His secret place, His pavilion around Him, darkness of waters, thick clouds of the skies.
I have blotted out, as a thick cloud, your transgressions, and, as a cloud, your sins; return to Me; for I have redeemed you.