Hadith 6766
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 6767
فَذَكَرْتُهُ
لِأَبِي بَكْرَةَ فَقَالَ : وَأَنَا سَمِعَتْهُ أُذُنَايَ وَوَعَاهُ قَلْبِي مِنْ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ .
I mentioned that to Abu Bakra, and he said, "My ears heard that and my heart memorized it from Allah's Apostle.
Hadith 6768
Narrated Abu Huraira: The Prophet said, "Do not deny your fathers (i.e. claim to be the sons of persons other than your fathers), and whoever denies his father, is charged with disbelief."