4:135O you who believe! Stand firmly for justice, as witnesses to God, even if against yourselves, or your parents, or your relatives. Whether one is rich or poor, God takes care of both. So do not follow your desires, lest you swerve. If you deviate, or turn away—then God is Aware of what you do.

4:176They ask you for a ruling. Say, “God gives you a ruling concerning the person who has neither parents nor children.” If a man dies, and leaves no children, and he had a sister, she receives one-half of what he leaves. And he inherits from her if she leaves no children. But if there are two sisters, they receive two-thirds of what he leaves. If the siblings are men and women, the male receives the share of two females.” God makes things clear for you, lest you err. God is Aware of everything.