Abu Dawud Book 12, Hadith Number 2893.
Chapter : Shares of the relatives on the maternal side.
Narated By Al-Miqdam al-Kindi : The Prophet (PBUH) said: If anyone leaves a debt or a helpless family I shall be responsible-and sometimes the narrator said: Allah and His Apostle will be responsible-but if anyone leaves property, it goes to his heirs. I am the heirs of him who has none, paying blood-wit for him and inheriting from him; and a maternal uncle is the heir of him who has none, paying blood-wit for him and inheriting from him.