Question :
Shaykh Ibn Baz was asked, it is acceptable in Islam to divorce the wife on request of Mother ?
Answer :
If your wife did not harm your mother and your mother does not fear any harm on you from her in regard to your self, religion or your wealth, she has no right to separate you from your wife. You do not have to obey her in this case, on the basis of the statement of the Prophet (peace be upon him):
There should be neither harming nor reciprocating harm.(Ibn Majah – 2340)
And his saying:
Obedience should only be in Ma`ruf (that which is judged as good, beneficial, or fitting by Islamic law and Muslims of sound intellect).(Al Bukhari – 7145, Muslim – 1840)
It is not kind to divorce your wife as long as she did not do anything wrong nor was corrupt in her religion. You may show this Fatwa to your mother and explain to her the Shar`y ruling in the hope that she changes her mind and let you keep your wife.
However, it is obligatory on you to obey her as much as you can without divorcing your wife. In your case, divorce is not incumbent on you. You have to supplicate to Allah (Exalted be He) to guide your mother and open her heart to forgive you and your wife as well. Allah has power over all things. Whoever fears Allah, He will make a way out for him. So, continue in the way of piety, obedience and watch out for things that He has forbidden. Then be hopeful and expectant of speedy relief, and a happy outcome.
May Allah grant us and you a blessed end.May Allah ease for us and you all affairs and open the heart of your mother to every good, for He is the Most Generous, the All-Bountiful.
Source : Fatwa of Allamah Ibn Baz