[176] They ask thee for a legal decision. Say:
Allah directs (thus) about those who leave no descendants or
ascendants as heirs. If it is a man that dies, leaving a sister but
no child, she shall have half the inheritance: if (such a deceased
was) a woman, who left no child, her brother takes her inheritance:
if there are two sisters, they shall have two-thirds of the
inheritance (between them): if there are brothers and sisters, (they
share), the male having twice the share of the female. Thus doth
Allah make clear to you (His law), lest ye err. And Allah hath
knowledge of all things.