From Sahih Bukhari (Hadith 2694):
Narrated Aisha:The following Verse: If a woman fears cruelty or desertion on her husband's part (i.e. the husband notices something unpleasant about his wife, such as old age or the like, and wants to divorce her, but she asks him to keep her and provide for her as he wishes). (4.128) "There is no blame on them if they reconcile on such basis
Reference: Bukhari 2694