Sahih Bukhari Book: 64, Hadith: 4370

حَدَّثَنَا مُحَمَّدُ بْنُ بَشَّارٍ، حَدَّثَنَا غُنْدَرٌ، حَدَّثَنَا شُعْبَةُ، عَنْ عَاصِمٍ، قَالَ سَمِعْتُ أَبَا عُثْمَانَ، قَالَ سَمِعْتُ سَعْدًا ـ وَهْوَ أَوَّلُ مَنْ رَمَى بِسَهْمٍ فِي سَبِيلِ اللَّهِ ـ وَأَبَا بَكْرَةَ ـ وَكَانَ تَسَوَّرَ حِصْنَ الطَّائِفِ فِي أُنَاسٍ ـ فَجَاءَ إِلَى النَّبِيِّ صلى الله عليه وسلم فَقَالاَ سَمِعْنَا النَّبِيَّ صلى الله عليه وسلم يَقُولُ ‏ “‏ مَنِ ادَّعَى إِلَى غَيْرِ أَبِيهِ وَهْوَ يَعْلَمُ فَالْجَنَّةُ عَلَيْهِ حَرَامٌ ‏”‏‏.‏ Narrated Abu `Uthman: I heard from Sa`d, the first man who has thrown an arrow in Allah’s Cause, and from Abu Bakra who jumped over the wall of the Ta’if Fort along with a few persons and came to the Prophet. They both said, “We heard the Prophet saying, ” If somebody claims to be the son of somebody other than his father knowingly, he will be denied Paradise (i.e. he will not enter Paradise).’ ” Narrated Ma`mar from `Asim from Abu Al-`Aliya or Abu `Uthman An-Nahdi who said. ...