Exodus 24:15
And Moses went up into the mountain, and a cloud covered the mountain.
Exodus 19:9
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.
Exodus 19:16
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.
Matthew 17:5
While he yet spoke, behold, a bright cloud overshadowed them. And behold a voice out of the cloud which said, This is My beloved Son in whom I am well pleased, hear Him.
2 Chronicles 6:1
And Solomon said, Jehovah has said that He would dwell in the thick darkness.