Imam Reza(A.S.) was attending a session that included the best scholars of Iraq and Khurasan when Al-Ma’mun asked them about the exegesis of Allah’s saying: We gave the Book as an inheritance to Our chosen servants, among whom some are unjust against their souls, some are moderate, and some are exceedingly virtuous by the permission of Allah. This is indeed a great favor. (Holy Qur’an 35:32)