Sayyiduna Jabir (may Allah be pleased with him) said: I heard the Prophet (peace and blessings be upon him) say: "After me twelve amirs will come to power." Then he (peace and blessings be upon him) said something further, so I asked my father, and he told me: He (peace and blessings be upon him) said: "All of them will be from Quraysh."
Hadith Referenceالمعجم الكبير للطبراني / باب الجيم / 1994