Revelation 17:1, 7

And there came one of the seven angels that had the seven bowls, and spake with me, saying, Come hither, I will show thee the judgment of the great harlot that sitteth upon many waters

And the angel said unto me, Wherefore didst thou wonder? I will tell thee the mystery of the woman, and of the beast that carrieth her, which hath the seven heads and the ten horns.