It was in the same period that narrators of hadiths (muhaddith) who were companions of Imam Jawad and Imam Hadi, namely Husayn ibn Saeed Ahwazi and his brother moved, first to Ahwaz and then to Qum.
"Wakati huo ndio unaotakiwa kumsubiri Imam Mahdi a.s. adhuhuri na huyo Imam a.s. atakuwa ni mtoto wa Imam Hasan al-Askari a.s. na alizaliwa tarehe 15 Sha'aban mwaka 255 Hijriyyah.