ʿUyūn akhbār al-Riḍā - Volume 1 > On Rare Traditions From al-Ridha About Various Issues
Hadith #15

15 - حَدَّثَنا عَلِىِّ بْنِ أَحْمَدِ بْنِ مُحَمَّدِ بْنِ عِمْران الدَّقَّاق رَضِىَ اللهُ عَنْهُ قالَ: حَدَّثَني مُحَمَّدِ بْنِ أَبي الكُوفِي، عَن أَحْمَدِ بْنِ مُحَمَّدِ بْنِ صالِح الرَّازِيُّ، عَن حَمْدانَ الديوانِي قالَ: قالَ الرِّضا عَلَيْهِ السَّلامُ صديق كُلِّ امرئ عقله وَعَدُوِّه جهله.

26-15 Ali ibn Ahmad ibn Muhammad ibn Imran ad-Daqqaq - may God be pleased with him - narrated that Muhammad ibn Abi Abdillah al-Kufi quoted on the authority of Ahmad ibn Muhammad ibn Salih al-Razi, on the authority of Hamdan ad-Diawni that Al-Ridha (s) said, “The friend of any individual is his mind and his enemy is his ignorance.”