'Cloud' in the Bible

I will put my bow in the cloud and it will be for a sign of the agreement between me and the earth.

And whenever I make a cloud come over the earth, the bow will be seen in the cloud,

And the bow will be in the cloud, and looking on it, I will keep in mind the eternal agreement between God and every living thing on the earth.

Now when the sun was going down, a deep sleep came on Abram, and a dark cloud of fear.