An-Nisaa 4:11

Allah instructs you concerning [the inheritance of] your children: the share of a male is equal to that of two females. If there are only daughters, two or more, they get two-thirds of the estate, but if there is only one daughter, she gets half. Each parent is entitled to one-sixth if he left offspring, but if he left no offspring and the parents are the only heirs, the mother gets one-third, but if he has siblings, the mother gets one-sixth, after settling any bequests or debts[9]. Your parents and your children, you do not know which of them will benefit you more. [These shares are] ordained by Allah; and Allah is All-Knowing, All-Wise.

[9] Based upon prophetic Hadīths, scholars have ruled that debt takes precedence over a bequest, that a bequest should not include anyone who inherit by law, and that the total bequest should not be more than one third of the estate. After the fulfillment of debts and bequests (if any), the remainder of the estate is to be divided.

Allāh instructs you concerning your children [i.e., their portions of inheritance]: for the male, what is equal to the share of two females. But if there are [only] daughters, two or more, for them is two thirds of one's estate.[164] And if there is only one, for her is half. And for one's parents, to each one of them is a sixth of his estate if he left children. But if he had no children and the parents [alone] inherit from him, then for his mother is one third. And if he had brothers [and/or sisters], for his mother is a sixth,[165] after any bequest he [may have] made or debt.[166] Your parents or your children - you know not which of them are nearest to you in benefit. [These shares are] an obligation [imposed] by Allāh. Indeed, Allāh is ever Knowing and Wise.

[164] Literally, "that which he left."
[165] Although the siblings themselves do not inherit in this case.
[166] Based upon prophetic ḥadīths, scholars have ruled that debt takes precedent over a bequest, that a bequest may not include any who inherit by law, and that the total bequest may not be more than one third of one's estate. After the fulfillment of debts and bequests (if any), the remainder of the estate is to be divided according to the ordinances in this sūrah.

11. Allâh commands you as regards your children’s (inheritance): to the male, a portion equal to that of two females; if (there are) only daughters, two or more, their share is two-thirds of the inheritance; if only one, her share is a half. For parents, a sixth share of inheritance to each if the deceased left children; if no children, and the parents are the (only) heirs, the mother has a third; if the deceased left brothers (or sisters), the mother has a sixth. (The distribution in all cases is) after the payment of legacies he may have bequeathed or debts. You know not which of them, whether your parents or your children, are nearest to you in benefit; (these fixed shares) are ordained by Allâh. And Allâh is Ever All-Knower, All-Wise.

Allah chargeth you concerning (the provision for) your children: to the male the equivalent of the portion of two females, and if there be women more than two, then theirs is two-thirds of the inheritance, and if there be one (only) then the half. And to each of his parents a sixth of the inheritance, if he have a son; and if he have no son and his parents are his heirs, then to his mother appertaineth the third; and if he have brethren, then to his mother appertaineth the sixth, after any legacy he may have bequeathed, or debt (hath been paid). Your parents and your children: Ye know not which of them is nearer unto you in usefulness. It is an injunction from Allah. Lo! Allah is Knower, Wise.