Inheritance
The law of inheritance in Islam is very complicated & has many disputes.Lets take a look at what the Quraan says about inheritance.
"Allah enjoins you about [the share of inheritance of] your children: A male's share shall equal that of two females -- in case there are only daughters, more than two shall have two-thirds of what has been left behind. And if there be only one daughter, her share shall be half -- and if the deceased has children, the parents shall inherit a sixth each, and if he has no children and the parents are his heirs then his mother shall receive a third, and if he has brothers and sisters then the mother's share is the same one-sixth. [These shares shall be distributed] after carrying out any will made by the deceased or payment of any debt owed by him (the deceased). You know not who among your children and your parents are nearest to you in benefit. This is the law of Allah. Indeed Allah is wise, all knowing."(4:11)
"You shall get half of what your wives leave, if they die childless. But if they do have children, your share shall then be a quarter of what they leave after carrying out any will made by the deceased or payment of any debt owed by her. And they (your wives) shall have a quarter of what you leave, if you die childless. But in case you have children, they shall then get one-eighth of what you leave, after carrying out any will made by you or payment of any debt owed by you (the deceased). And if a man or a woman is made an heir on account of his [or her] kalalah relationship [with the deceased] and he [or she] has one brother or sister, the brother and sister shall each receive a sixth and if they be more than two, they shall then share in one-third, after carrying out any will that had been made by the deceased or payment of any debt owed by him -- without harming anyone. This is a command from Allah and Allah is all-knowing, most forbearing."(4:12)
"They ask you. Say: Allah enjoins you about your kalalah heirs that if a man dies childless and he has only a sister, she shall inherit half of what he leaves; and if she dies childless, then her brother shall be her heir; and if their are two sisters, they shall inherit two-thirds of what he [or she] leaves. If there are many brothers and sisters, the share of each male should be that of two females. Allah makes [His commands] clear to you, so that you do not err. Allah has knowledge of all things."(4:176)
Sahih Bukhari,Volume 8, Book 80, Number 724:
Narrated Ibn 'Abbas:
The Prophet said, "Give the Fara'id (the shares of the inheritance that are prescribed in the Qur'an) to those who are entitled to receive it. Then whatever remains, should be given to the closest male relative of the deceased ."
Sahih Bukhari,Volume 8, Book 80, Number 756:
Narrated Usama bin Zaid:
The Prophet said, "A Muslim cannot be the heir of a disbeliever, nor can a disbeliever be the heir of a Muslim."