(1) باب النَّاسُ تَبَعٌ لِقُرَيْشٍ وَالْخِلاَفَةُ فِي قُرَيْشٍ
It has been reported on the authority of Jabir b. Samura who said:
I went with my father to the Messenger of Allah (may peeace be upon him) and I heard him say: This religion would continue to remain powerful and dominant until there have been twelve Caliphs. Then he added something which I couldn't catch on account of the noise of the people. I asked my father: What did he say? My father said: He has said that all of them will be from the Quraish.
Reference: Sahih Muslim 1821 f
In-book reference: Book 33, Hadith 10
USC-MSA web (English) reference(deprecated numbering scheme): Book 20, Hadith 4482