“Once I was in the presence of abu ‘Abdallah (a.s.) that Mihzam came in and to The Imam (a.s.), ‘May Allah take my soul in service for your cause, enlighten me about this matter that we wait for (the rise of al-Mahdi with Divine authoriiity). When it will take place?” The Imam (a.s.) said, “O Mihzam, those who give it d definite time have lied, the expediting ones perish and salvation is for those who are submissive.”