Sahih Bukhari
Sahih Bukhari Volume 008, Book 080, Hadith Number 758.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 80. Laws of Inheritence (Al-Faraa'id)
Narrated By Sa'd : I heard the Prophet saying, "Whoever claims to be the son of a person other than his father, and he knows that person is not his father, then Paradise will be forbidden for him." I mentioned that to Abu Bakra, and he said, "My ears heard that and my heart memorized it from Allah's Apostle.