'Cloud' in the Bible

Then I saw another mighty angel coming down from heaven, clothed in a cloud, with a rainbow (halo) over his head; and his face was like the sun, and his feet (legs) were like columns of fire;

And the two witnesses heard a loud voice from heaven saying to them, “Come up here.” Then they ascended into heaven in the cloud, and their enemies watched them.

Again I looked, and this is what I saw: a white cloud, and sitting on the cloud was One like the Son of Man, with a crown of gold on His head and a sharp sickle [of swift judgment] in His hand.

And another angel came out of the temple, calling with a loud voice to Him who was sitting upon the cloud, “Put in Your sickle and reap [at once], for the hour to reap [in judgment] has arrived, because the earth’s harvest is fully ripened.”

So He who was sitting on the cloud cast His sickle over the earth, and the earth was reaped (judged).