Al-Musayyab bin Rafi' narrates from Sayyiduna Jabir bin Samurah (may Allah be pleased with him) that he said: The Messenger of Allah (peace and blessings be upon him) said: "This matter will continue to prevail; whoever opposes it will not harm it, until twelve leaders (amirs) have arisen, all of them from Quraysh."
Hadith Referenceالمعجم الكبير للطبراني / باب الجيم / 1870