КОРАН (английский перевод) - 4.12

For you half of what your wives leave if they have no child. If they have a child, a quarter of what they leave shall be yours after any bequest she had bequeathed, or any debt. And for them (the females) they shall inherit one quarter of what you leave if you have no child. If you have a child, they shall inherit one eighth, after any bequest you had bequeathed, or any debt. If a man or a woman have no direct heirs, but have a brother or a sister, to each of the two a sixth. If they are more than that, they shall equally share the third, after any bequest that he had bequeathed or any debt without harm. This is an obligation from Allah. He is the Knower, the Clement.