(1) باب النَّاسُ تَبَعٌ لِقُرَيْشٍ وَالْخِلاَفَةُ فِي قُرَيْشٍ
It has been reported on the authority of Jabir b. Samura who said:
I heard the Messenger of Allah (ﷺ) say: The affairs of the people will continue to be conducted (well) as long as they are governed by twelve men. Then the Prophet (ﷺ) said words which were obscure to me. I asked my father: What did the Messenger of Allah (ﷺ) say? He said: All of the (twelve men) will be from the Quraish.
Reference: Sahih Muslim 1821 b
In-book reference: Book 33, Hadith 6
USC-MSA web (English) reference(deprecated numbering scheme): Book 20, Hadith 4478