Sahih Bukhari
Sahih Bukhari Volume 003, Book 046, Hadith Number 705.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 46. Manumission Of Slaves
Narated By Abu Huraira : The Prophet said, "Allah has accepted my invocation to forgive what whispers in the hearts of my followers, unless they put it to action or utter it." (See Hadith No. 657 Vol. 8)