Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
suyuti:16710a –
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السيوطي:١٦٧١٠a –

"كُفْرٌ بِامْرِئٍ ادِّعَاءُ نَسَبٍ لَا يَعْرِفُهُ أَوْ جَحْدُهُ وَإِنْ دَقَّ".  

[هـ] ابن ماجة [طس] الطبرانى في الأوسط عن عمرو بن شعيب عن أَبيه عن جده

See similar narrations below:

Collected by Ibn Mājah, Suyūṭī
ibnmajah:2744 – Muḥammad b. Yaḥyá > ʿAbd al-ʿAzīz b. ʿAbdullāh > Sulaymān b. Bilāl > Yaḥyá b. Saʿīd > ʿAmr b. Shuʿayb from his father from his grandfather

“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.”*  

ابن ماجة:٢٧٤٤ – 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 ﷺ قَالَ كُفْرٌ بِامْرِئٍ ادِّعَاءُ نَسَبٍ لاَ يَعْرِفُهُ أَوْ جَحْدُهُ وَإِنْ دَقَّ