Then a mighty angel picked up a stone the size of a great millstone and cast it into the sea, saying: “With such violence the great city of Babylon will be cast down, never to be seen again.
KJV
And a mighty angel took up a stone like a great millstone, and cast [it] into the sea, saying, Thus with violence shall that great city Babylon be thrown down, and shall be found no more at all.
ASV
And a strong angel took up a stone as it were a great millstone and cast it into the sea, saying, Thus with a mighty fall shall Babylon, the great city, be cast down, and shall be found no more at all.