'Cloud' in the Bible

Then I saw another strong angel coming down from Heaven. He was robed in a cloud, and over his head was the rainbow. His face was like the sun, and his feet resembled pillars of fire.

Then they heard a loud voice calling to them out of Heaven, and bidding them come up; and they went up to Heaven in the cloud, and their enemies saw them go.

Then I looked, and a white cloud appeared, and sitting on the cloud was some One resembling the Son of Man, having a wreath of gold upon His head and in His hand a sharp sickle.

And another, an angel, came out of the sanctuary, calling in a loud voice to Him who sat on the cloud, and saying, "Use your sickle and reap the harvest, for the hour for reaping it has come: the harvest of the earth is over-ripe."

Then He who sat on the cloud flung His sickle on the earth, and the earth had its harvest reaped.