Sahih Bukhari
Laws of Inheritance (Al-Faraaid)
Volume: 008 / Book Number: 080 / Hadith Number: 738
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; and whatever is left should be given to the closest male relative of the deceased."