None of the biographers have stated his birth date.

None of the biographers have stated his birth date. However, we can draw some conclusions in this regard from his own book Kamal al-Din, and Sheikh Toosi's Ghaybat and Najashi's Fehrest that he was born after the demise of Muhammad ibn Uthman al-Umari - who was the second (of the four) representatives of the twelfth Imam (MGB) - that is in the year 305 A.H. (917 A.D.) at the…