Revelation 2:21-23

21And I gave her space to repent of her fornication; and she repented not.

22Behold, I will cast her into a bed, and them that commit adultery with her into great tribulation, except they repent of their deeds.

23And I will kill her children with death; and all the churches shall know that I am he which searcheth the reins and hearts: and I will give unto every one of you according to your works.