Revelation 17:5

5 and on her forehead was written a name, a mystery: "Babylon the great, mother of whores and of earth's abominations."

Revelation 17:5 In-Context

3 So he carried me away in the spirit into a wilderness, and I saw a woman sitting on a scarlet beast that was full of blasphemous names, and it had seven heads and ten horns.
4 The woman was clothed in purple and scarlet, and adorned with gold and jewels and pearls, holding in her hand a golden cup full of abominations and the impurities of her fornication;
5 and on her forehead was written a name, a mystery: "Babylon the great, mother of whores and of earth's abominations."
6 And I saw that the woman was drunk with the blood of the saints and the blood of the witnesses to Jesus. When I saw her, I was greatly amazed.
7 But the angel said to me, "Why are you so amazed? I will tell you the mystery of the woman, and of the beast with seven heads and ten horns that carries her.
New Revised Standard Version Bible, copyright 1989, Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved.