Sahih Bukhari
Laws of Inheritance (Al-Faraaid)
Volume: 008 / Book Number: 080 / Hadith Number: 729
Narrated Ibn 'Abbas:
The Prophet said, "Give the Fara'id, (the shares prescribed in the Qur'an) to those who are entitled to receive it, and then whatever remains, should be given to the closest male relative of the deceased."