'Mighty Angel' in the Bible

And to you that are afflicted rest with us, at the revelation of the Lord Jesus from heaven with his mighty angels,

And I saw another mighty angel coming down from heaven clothed with a cloud, and a rainbow upon his head, and his face as the sun, and his feet as pillars of fire.

And a mighty angel took up a stone like a great mill-stone, and cast it into the sea, saying, Thus with violence shall Babylon, the great city, be thrown down, and shall be found no more at all.