Revelation 18:6 in the King James Version
Reward her even as she rewarded you, and double unto her double according to her works: in the cup which she hath filled fill to her double.
Context
5 for her sins have reached to the sky, and God has remembered her iniquities.
6 Return to her just as she returned, and repay her double as she did, and according to her works. In the cup which she mixed, mix to her double.
7 However much she glorified herself and grew wanton, so much give her of torment and mourning. For she says in her heart, ‘I sit a queen, and am no widow, and will in no way see mourning.’