Revelation 2:21-23

Young's Literal Translation

²¹ and I did give to her a time that she might reform from her whoredom, and she did not reform;

²² lo, I will cast her into a couch, and those committing adultery with her into great tribulation -- if they may not repent of their works,

²³ and her children I will kill in death, and know shall all the assemblies that I am he who is searching reins and hearts; and I will give to you -- to each -- according to your works.