5 - Narrated to us Husain bin Ahmad bin Idrees (r.a.): Narrated to us my father Ayyub bin Nuh from Muhammad bin Sinan from Safwan [bin Mehran] from As-Sadiq Ja’far bin Muhammad that he said: “One who has faith all the Imams but denies the Mahdi, is like one who believes in all the prophets but rejects the prophethood of Muhammad (S). He was asked: O son of Allah’s Messenger, who is the Mahdi from your progeny? He replied: The fifth descendant of the seventh Imam, whose person will remain hidden from your view and uttering his name will be unlawful for you.”