Verses 11-14 of Chapter 4:

As regards inheritance, Allah enjoins you concerning your children that: The share of the male shall be twice that of the female. In case the heirs be more than two females, their total share shall be two-thirds of the whole and if there be only one daughter, her share shall be half of the whole. If the deceased has children, each of his parents shall get one-sixth of the whole, but if he be childless and his parents alone are his heirs, the mother shall have one-third of the whole. If the deceased has brothers and sisters also, the mother shall be entitled to one-sixth of the whole. The division of all these shares shall take place only after fulfilling the terms of the will and after the payment of the debt (if any). As regards your parents and your children, you do not know who is more beneficial to you. Allah has apportioned these shares and most surely Allah is All-Knowing, All-Wise. And you will get half of what your wives leave behind, if they be childless; but if they leave children, then your share will be one fourth of what they have left, after the fulfillment of their will and the payment of their debt (if any). As for them, they will be entitled to one-fourth of the inheritance left by you, if you are childless; but in case you leave behind children, their share will be one-eighth of the whole after the fulfillment of your will and payment of your debt (if any). And if the deceased whether man or woman (whose property is ' to be divided as inheritance) leaves no children and no parents behind but has one brother or one sister alive each of the two will be entitled to one-sixth of the whole but in case the brothers and the sisters are more than one then the total share of all of them will be one-third of the whole after the fulfillment of the will and the payment of the debt (if any) provided that it is not injurious (to the heirs). This is the Commandment of Allah and Allah is All-Knowing and Lenient. These are the limits prescribed by Allah: whoever obeys Allah and His Messenger, He will admit him into the Gardens underneath which canals flow, wherein he will abide for ever; this is the great success. And whoever disobeys Allah and His Messenger and transgresses the limits prescribed by Him, Allah will cast him into the Fire wherein he shall abide for ever, and shall have a disgraceful chastisement.