Question 48: I have a very good wife who keeps up Salaah (Prayer)and observes Hijaab (veil) in such a perfect manner that she has convinced all the women of our village to observe it. She has many good qualities but she makes some mistakes that I cannot overlook, lest they have a religious ruling. When she is angry, she curses me or my father, or utters things like, “May the Jinn harm you,” “I am not lawful to you”, or “It is not lawful for me to be your wife anymore.” Is it better for me to be patient? Are these words considered a serious violation of our marital duties?
Answer: If your wife is as righteous as you have mentioned, but she is afflicted with a foul mouth, you should tolerate her for the merits she has and advise her to avoid cursing and using foul language. You should urge her to perform Tawbah (repentance to Allaah) and to avoid the reasons that cause her to get angry. Moreover, she must offer Kaffaarah (expiation) for taking a false oath deeming her unlawful to you, but this has no effect on your marital relationship... read more here.