١٤ - حدثنا الحسين بن أحمد البيهقي، قال: أخبرنا محمد بن يحيى الصولي، قال: حدثنا أبو ذكوان، قال: سمعت إبراهيم بن العباس يقول: ما رأيت الرضا (عليه السلام) سئل عن شئ قط إلا علمه، ولا رأيت أعلم منه بما كان في الزمان إلى وقته وعصره، وكان المأمون يمتحنه بالسؤال عن كل شئ فيجيب فيه، وكان كلامه كله وجوابه وتمثيله بآيات من القرآن، وكان يختمه في كل ثلاث، ويقول: لو أردت أن أختمه في أقل من ثلاث لختمت، ولكن ما مررت بآية قط إلا فكرت فيها، وفي أي شئ أنزلت، وفي أي وقت، فلذلك صرت أختم في ثلاثة أيام (٢).
Al-Husayn b. Ahmad al-Bayhaqi narrated to us. He said: Muhammad b. Yahya al-Sawli narrated to us. He said: Abu Dhakwan narrated to us. He said: I heard Ibrahim b. al-`Abbas say: I have never seen al-Rida  asked about anything except that he knew its answer. I have never seen one more knowledgeable than him since his time and age. Al-Ma’mun would test him by asking him about everything, and he would answer him. His words, his answers, and his metaphors were all from the verses of the Quran. He would complete [reciting] it every three days, and he would say: Had I wanted to finish it in fewer than three days, I would have done so. However, I do not ever pass by a verse without thinking about it, why it was revealed and when – and for that reason, I finish it every three days.