'Cloud' in the Bible

I saw a mighty angel coming down out of the sky, clothed with a cloud. A rainbow was on his head. His face was like the sun, and his feet like pillars of fire.

I heard a loud voice from heaven saying to them, "Come up here!" They went up into heaven in the cloud, and their enemies saw them.

I looked, and behold, a white cloud; and on the cloud one sitting like a son of man, having on his head a golden crown, and in his hand a sharp sickle.

Another angel came out from the temple, crying with a loud voice to him who sat on the cloud, "Send forth your sickle, and reap; for the hour to reap has come; for the harvest of the earth is ripe!"

He who sat on the cloud thrust his sickle on the earth, and the earth was reaped.