(1) Abdul Wahid bin Abdullah narrated from Muhammad bin Ja’far al-Qarashi from Muhammad bin al-Hasan bin Abul-Khattab from Muhammad bin Sinan that Abu Imara Hamza at-Tayyar had heard Abu Abdullah as-Sadiq saying: “If there are no people on the earth except two men, one of them must be al-Hujjah (Imam al-Mahdi).”