'Thick Cloud' in the Bible

And I make it a waste, It is not pruned, nor arranged, And gone up have brier and thorn, And on the thick clouds I lay a charge, From raining upon it rain.

I go up above the heights of a thick cloud, I am like to the Most High.

For thus said Jehovah unto me, 'I rest, and I look on My settled place, As a clear heat on an herb. As a thick cloud of dew in the heat of harvest.

The burden of Egypt. Lo, Jehovah is riding on a swift thick cloud, And He hath entered Egypt, And moved have been the idols of Egypt at His presence, And the heart of Egypt melteth in its midst.

As heat in a dry place, The noise of strangers Thou humblest, Heat with the shadow of a thick cloud, The singing of the terrible is humbled.

I have blotted out, as by a thick cloud, Thy transgressions, And as by a cloud thy sins, Return unto Me, for I have redeemed thee.

Who are these -- as a thick cloud they fly, And as doves unto their windows?