Holy Qur’an 4:13
And you shall have half of that which your wives leave, if they have no child; but if they have a child, then you shall have a fourth of that which they leave, after the payment of any bequests they may have bequeathed or of debt. And they shall have a fourth of that which you leave, if you have no child; but if you have a child, then they shall have an eighth of that which you leave, after the payment of any bequests you may have bequeathed or of debt. And if there be a man or a woman whose heritage is to be divided and he or she has neither parent nor child, and he or she has a brother or a sister, then each one of them shall have a sixth. But if they be more than that, then they shall be equal sharers in onethird, after the payment of any bequests which may have been bequeathed or of debt, without prejudice to the debt. This is an injunction from Allah, and Allah is All-Knowing, Forbearing.
Translation: Maulawi Sher Ali (Ahmadiyya Muslim Jamaat)