١٤ - حَدَّثَنا الْحاكِم أَبُو عَلِي الحُسَيْنِ بْنِ أحْمَدالْبِيْهَقِيُّ قالَ حَدَّثَني مُحَمَّدِ بْنِ يَحْيَى الصُّوليُّ قالَ: حَدَّثَنا أَحْمَدِ بْنِ القاسِم بْنِ إِسْمَاعِيل قالَ سَمِعْتُ إِبْراهيمِ بْنِ العَبَّاسِ يَقُولُ: لَمَّا عَقَدَ الْمَأْمُونُ الْبَيْعَةَ لِعَلِيِّ بْنِ مُوسَى الرِّضَا عَلَيْهِ السَّلامُ قَالَ لَهُ الرِّضَا عَلَيْهِ السَّلامُ يَا أَمِيرَ الْمُؤْمِنِينَ إِنَّ النُّصْحَ وَاجِبٌ لَكَ وَالْغِشَّ لا يَنْبَغِي لِمُؤْمِنٍ إِنَّ الْعَامَّةَ لَتَكْرَهُ مَا فَعَلْتَ بِي وَالْخَاصَّةَ تَكْرَهُ مَا فَعَلْتَ بِالْفَضْلِ بْنِ سَهْلٍ وَالرَّأْيُ لَكَ أَنْ تُبْعِدَنَا عَنْكَ حَتَّى يَصْلُحَ لَكَ أَمْرُكَ قَالَ إِبْرَاهِيمُ فَكَانَ وَاللَّهِ قَوْلُهُ هَذَا السَّبَبَ فِي الَّذِي آلَ الأَمْرُ إِلَيْهِ.
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).”