Sahih Bukhari
Laws of Inheritance (Al-Faraaid)
Volume: 008 / Book Number: 080 / Hadith Number: 721
Narrated Abu Huraira:
Allah's Apostle said, "Not even a single Dinar of my property should be distributed (after my deaths to my inheritors, but whatever I leave excluding the provision for my wives and my servants, should be spent in charity."