Sahih Bukhari
Wills and Testaments (Wasaayaa)
Volume: 004 / Book Number: 051 / Hadith Number: 37
Narrated Abu Huraira:
Allah's Apostle said, "My heirs will not inherit a Dinar or a Dirham (i.e. money), for whatever I leave (excluding the adequate support of my wives and the wages of my employees) is given in charity."