Musnad Abu Ya'la al-Mawsili 3:187

Abu Hisham al-Rifa'i narrated to us, Muhammad ibn Fudayl narrated to us, al-Ajlah narrated to us, from Salamah ibn Kuhayl, from Habbah ibn Juwayn, from Ali, who said: "I do not know anyone from this nation, after its Prophet, who worshipped Allah before me. I worshipped Him five years or seven years before anyone among them worshipped Him."