Revelation 17:4-5

4The woman was dressed in purple and scarlet, and adorned with gold, precious stones and pearls, [and she was] holding in her hand a gold cup full of the abominations and the filth of her [sexual] immorality.

5And on her forehead a name was written, a mystery: “BABYLON THE GREAT, THE MOTHER OF PROSTITUTES (false religions, heresies) AND OF THE ABOMINATIONS OF THE EARTH.”