Musnad Ahmad 907:75

Yunus ibn Muhammad narrated to us, Hammad—meaning ibn Zayd—narrated to us, Mujalid narrated to us, from al-Sha’bi, from Jabir ibn Samurah, who said: The Messenger of Allah (peace and blessings of Allah be upon him) delivered a sermon to us at Arafat and said: "This matter will continue to be mighty, fortified, and victorious over those who oppose it, until twelve [leaders] rule, all of them..." He said: I did not understand what came after that. He said: So I said to my father, "What is after 'all of them'?" He said: "All of them are from Quraysh."