Four Deputies (النُواب الأربَعَة) of Imam al-Mahdi (a.s)-3. Al-Husayn b. Ruh al-Nawbakhti

  Companion of: Imam al-‘Askari (a.s), Imam al-Mahdi (a.s) Teknonym: Abu l-Qasim Death/Martyrdom: 326/938 Burial Place: Baghdad Professors: Muhammad b. ‘Uthman Activities: The third special deputy of Imam al-Mahdi (a.s)