Question Summary:
How can a married man stop his habit of masturbation?

Question Detail:

My husband is in a severe habit of masturbation. I am married from 15 years and suffering with this issue from day 1. I am suffering badly. I have kids. My husband is very loving and caring but cant help it. I tried speaking to him but its not working

Answer :

In the Name of Allah, the Most Gracious, the Most Merciful.
As-salāmu ‘alaykum wa-rahmatullāhi wa-barakātuh.
You should tell him that this is a sinful, prohibited act and that he should repent immediately. Tell him that he should thank Allah for giving him a wife and a halal, rewarding way to fulfill his needs and satisfy his desires.
It is such a great blessing of Allah to have a wife one can love, cherish and get reward for fulfilling one's desires with. To ignore this blessing and continue in this sin would be very ungrateful of him.
As a permissible alternative, he can instead seek satisfaction from the wife's hand (i.e have her assist him in fulfilling his needs) since it is permissible to seek satisfaction from one's spouse and this would not be considered as impermissible masturbation. [i][ii]
Mufti Sohail ibn Arif,
Assistant Mufti, Darul Iftaa
Chicago, USA
Checked and Approved by,
Mufti Ebrahim Desai.
 
زاد في معراج الدراية وعن أحمد والشافعي في القديم الترخص فيه وفي الجديد يحرم ويجوز أن يستمني بيد زوجته [i]
 وخادمته اهـ وسيذكر الشارح في الحدود عن الجوهرة أنه يكره ولعل المراد به كراهة التنزيه فلا ينافي قول المعراج يجوز تأمل وفي السراج إن أراد بذلك تسكين الشهوة المفرطة الشاغلة للقلب وكان عزبا لا زوجة له ولا أمة أو كان إلا أنه لا يقدر على الوصول إليها لعذر قال أبو الليث أرجو أن لا وبال عليه وأما إذا فعله لاستجلاب الشهوة فهو آثم اهـ.
رد المحتار، ٢/ ٣٩٩
 يجوز أن يستمني بيد زوجته أو خادمته، وانظر ما كتبناه هناك (قوله ولا شيء عليه) أي من حد وتعزير، وكذا من [ii]
 إثم على ما قلناه
المرجع السابق، ٤/ ٢٨