Sahih Bukhari

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