Abu Dawud Book 12, Hadith Number 2895.
Chapter : Shares of the relatives on the maternal side.
Narated By Al-Miqdam : I heard the Apostle of Allah (PBUH) say: I am the heirs of Him who has none, freeing him from his liabilities, and inheriting what he possesses. A maternal uncle is the heir of Him who has none, freeing him from his liabilities, and inheriting his property.