Narrated Kulaib bin Wail:

I asked Zainab bint Abi Salama (i.e. daughter of the wife of the Prophet, "Tell me about the Prophet . Did he belong to the tribe of Mudar?" She replied, "Yes, he belonged to the tribe of Mudar and was from the offspring of An-Nadr bin Kinana."

حَدَّثَنَا قَيْسُ بْنُ حَفْصٍ، حَدَّثَنَا عَبْدُ الْوَاحِدِ، حَدَّثَنَا كُلَيْبُ بْنُ وَائِلٍ، قَالَ حَدَّثَتْنِي رَبِيبَةُ النَّبِيِّ، ﷺ زَيْنَبُ ابْنَةُ أَبِي سَلَمَةَ قَالَ قُلْتُ لَهَا أَرَأَيْتِ النَّبِيَّ ﷺ أَكَانَ مِنْ مُضَرَ قَالَتْ فَمِمَّنْ كَانَ إِلاَّ مِنْ مُضَرَ مِنْ بَنِي النَّضْرِ بْنِ كِنَانَةَ.