40-14 Al-Hakim Abu Ali Al-Husayn ibn Ahmad al-Bayhaqi narrated that Muhammad ibn Yahya al-Sowli quoted on the authority of Ahmad ibn Al-Qasim ibn Isma’il that he had heard Ibrahim ibn Al-Abbas say, “When Al-Ma’mun pledged allegiance to Ali ibn Musa Ar-Ridha’ , the Imam told him, ‘O Commander of the Faithful! It is obligatory to be sincere with you. It is not proper for a believer to be tricky. The masses of the people do not like what you did to me. Especially, the elites do not like what you did with Al-Fadhl ibn Sahl. Now it is best for you to send both of us away from yourself until you can manage your own affairs.’” Ibrahim said, “By God! It was these words which resulted in what happened to him (death).”