Reflection of Imam Reza's Subrogation in Shiite and Sunni texts up to the fifth century AH

Different and sometimes conflicting narrations from Imam Reza's Subrogation have been reflected in Sunni and Shia texts. Therefore, the problem of this article is to study Subrogation narratives in Islamic Historiography, And the author intends to answer these questions: How Has Imam Reza's Subrogation been reflected in historical sources, and have historians mention to Imam Reza's compulsion to accept succession? Which sources have mentioned this issue? The author intends to answer these questions using a descriptive-analytical method. The results of this study show that each of these historians, influenced by their own insights and attitudes, has reflected the Subrogation narrative in their text. Sunni religious historians have sought to legitimize the al-Ma'mun government and have rejected the report of al-Ma'mun compulsion to accept the Subrogation of Imam Reza, so that they intend to convey to the reader that acceptance of Imam Reza's Subrogation was based on consent. Shiite historians who have written their texts during the Shiite Buyid dynasty, have studied and mentioned in detail the issue of the compulsion of Imam Reza. The