Revelation 17:1-2, 5

Then one of the seven angels who had the seven bowls came and spoke to me. He said, “Come, and I will show you the punishment that will be given to the great prostitute, the one sitting over many waters. The kings of the earth sinned sexually with her, and the people of the earth became drunk from the wine of her sexual sin.”

On her forehead a title was written that was secret. This is what was written: the great babylon mother of prostitutes and of the evil things of the earth