Sunan Ibn Majah, Volume 4, Book 23, Hadith 2744 (DarusSalam) ⓘ

It was narrated from ‘Amr bin Shu’aib, from his father, from his grandfather, that the Prophet said: “It is disbelief for a man to attribute himself to someone other than his father knowingly, or to deny his connection to his father, even subtly.”*

حَدَّثَنَا مُحَمَّدُ بْنُ يَحْيَى، حَدَّثَنَا عَبْدُ الْعَزِيزِ بْنُ عَبْدِ اللَّهِ، حَدَّثَنَا سُلَيْمَانُ بْنُ بِلاَلٍ، عَنْ يَحْيَى بْنِ سَعِيدٍ، عَنْ عَمْرِو بْنِ شُعَيْبٍ، عَنْ أَبِيهِ، عَنْ جَدِّهِ، أَنَّ النَّبِيَّ صلى الله عليه وسلم قَالَ ‏ "‏ كُفْرٌ بِامْرِئٍ ادِّعَاءُ نَسَبٍ لاَ يَعْرِفُهُ أَوْ جَحْدُهُ وَإِنْ دَقَّ ‏" ‏ ‏.‏