Revelation 2:22 in the King James Version
Behold, I will cast her into a bed, and them that commit adultery with her into great tribulation, except they repent of their deeds.
Context
21 I gave her time to repent, but she refuses to repent of her sexual immorality.
22 Behold, I will throw her and those who commit adultery with her into a bed of great oppression, unless they repent of her works.
23 I will kill her children with Death, and all the assemblies will know that I am he who searches the minds and hearts. I will give to each one of you according to your deeds.