Sahih Bukhari
Wills and Testaments (Wasaayaa)
Volume: 004 / Book Number: 051 / Hadith Number: 20
Narrated Kab bin Malik:
I said, "O Allah's Apostle! For the acceptance of my repentance I wish to give all my property in charity for Allah's sake through His Apostle ." He said, "It is better for you to keep some of the property for yourself." I said, "Then I will keep my share in Khaibar."