Musnad Ahmad 907:120

Abdullah narrated to us, Muhammad ibn Abi Bakr al-Muqaddami narrated to us, Yazid ibn Zuray' narrated to us, Ibn 'Awn narrated to us, from al-Sha'bi, from Jabir ibn Samurah, from the Prophet, peace and blessings of Allah be upon him, who said: "This matter will continue to be mighty and fortified; they will be victorious over whoever opposes them regarding it, until twelve caliphs." Then he said a word that the people made unclear to me. So I said to my father: "What did he say?" He said: "All of them are from Quraysh."