Muḥammad b. al-ʿAlāʾ > Isḥāq b. Manṣūr al-Salūlī > Jaʿfar al-Aḥmar > al-Sarī b. Ismāʿīl > Qays b. Abū Ḥāzim

I came to the Prophet ﷺ to pledge allegiance to him, but when I arrived, he had passed away, and Abu Bakr was standing in his place. He praised and cried for a long time, then he said, "I heard the Messenger of Allah ﷺ saying, 'Disbelief is to deny one's lineage, even if it is known, and to claim a lineage that is unknown.'" – Weak Chain

حَدَّثَنَا مُحَمَّدُ بْنُ الْعَلَاءِ حَدَّثَنَا إِسْحَاقُ بْنُ مَنْصُورٍ السَّلُولِيُّ عَنْ جَعْفَرٍ الْأَحْمَرِ عَنْ السَّرِيِّ بْنِ إِسْمَاعِيلَ عَنْ قَيْسِ بْنِ أَبِي حَازِمٍ قَالَ

أَتَيْتُ النَّبِيَّ ﷺ لِأُبَايِعَهُ فَجِئْتُ وَقَدْ قُبِضَ وَأَبُو بَكْرٍ قَائِمٌ فِي مَقَامِهِ فَأَطَالَ الثَّنَاءَ وَأَكْثَرَ الْبُكَاءَ فَقَالَ سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ «كُفْرٌ بِاللَّهِ انْتِفَاءٌ مِنْ نَسَبٍ وَإِنْ دَقَّ وَادِّعَاءُ نَسَبٍ لَا يُعْرَفُ» – إسناده ضعيف