Revelation 2:22 in the World English Bible
Behold, I will throw her and those who commit adultery with her into a bed of great oppression, unless they repent of her works.
Context
21 And I gave her space to repent of her fornication; and she repented not.
22 Behold, I will cast her into a bed, and them that commit adultery with her into great tribulation, except they repent of their deeds.
23 And 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.