کتاب زندگانی چهارده معصوم (ع) (14 1) ترجمه انگلیسی جلد 11 نشر انتشارات انصاریان

About Forty years of the life of Imam Ali Reza (a.s.) had passed and did not have a son. The Shias were showing restlessness and anxiety and praying to God to grant Imam (a.s.) a son who was being awaited, since they had heard from their previous Imams that the Ninth Imam is the son of the eighth Imam.