Arabic (Original)
حَدَّثَنَا عَلِيُّ بْنُ عَاصِمٍ عَنِ الْمُثَنَّى بْنِ الصَّبَّاحِ عَنْ عَمْرِو بْنِ شُعَيْبٍ عَنْ أَبِيهِ عَنْ جَدِّهِ قَالَ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ كُفْرٌ بِاللَّهِ تَبَرُّؤٌ مِنْ نَسَبٍ وَإِنْ دَقَّ أَوْ ادِّعَاءٌ إِلَى نَسَبٍ لَا يُعْرَفُ.
English Translation
Ali ibn Asim told us, from al-Muthanna ibn al-Sabbah, from Amr ibn Shu'ayb, from his father, from his grandfather, who said: The Messenger of Allah, peace and blessings be upon him, said: "It is disbelief in Allah to disown one's lineage, however slight it may be, or to claim a lineage that is not established."