Hadith #3344 (Sahih al-Bukhari)
Book: Virtues and Merits of the Prophet (pbuh) and his Companions
Narrator(s): Klyb bin Wa'il كليب بن وائل
Grade: Sahih

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.”

Source: https://parallelquran.com/hadith/sahih-al-bukhari-3344/