Narrated 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."
Hadith ReferenceSahih Bukhari / The Book of Al-Farad (The Laws of Inheritance) / Hadith: 6766
Hadith Gradingمحدثین:أحاديث صحيح البخاريّ كلّها صحيحة