(1) بَابُ قَوْلُ اللَّهِ تَعَالَى: {يَا أَيُّهَا النَّاسُ إِنَّا خَلَقْنَاكُمْ مِنْ ذَكَرٍ وَأُنْثَى وَجَعَلْنَاكُمْ شُعُوبًا وَقَبَائِلَ لِتَعَارَفُوا إِنَّ أَكْرَمَكُمْ عِنْدَ اللَّهِ أَتْقَاكُمْ}
Narrated Kulaib bin Wail:
I asked Zainab bint Abi Salama (i.e. daughter of the wife of the Prophet, "Tell me about the Prophet (ﷺ) . 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."
Reference: Sahih al-Bukhari 3491
In-book reference: Book 61, Hadith 3
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 4, Book 56, Hadith 697