An Al-Wasiyya, commonly referred to as an Islamic Will, is a legally binding document that specifies a person’s final intentions, the assets they intend to leave behind, and the distribution of those assets in accordance with Sharia law.

An Islamic will, in contrast to other wills, states who are qualified to inherit property. 

The first verses of Surah an Nisa (chapter four) of the Holy Qur’an give instructions on this.

Islamic wills are flexible in that you can modify which beneficiaries will receive which assets, despite the fact that under Islam the beneficiaries of assets are fixed.  A specified percentage of the estate may be inherited by each qualified person, but this percentage is liable to vary.

For instance, If the percentage given to a person, such as your wife, is problematic for you, you can apply for written permission to remove provisions from someone with a larger percentage, such as your parents, in order to provide your wife extra provisions. You must revise your will once you get written approval.