Al-Adab Al-Mufrad, Hadith 565 ⓘ
Abu Sa'id said, "No one is forbearing unless he himself has made a mistake., No one is wise unless he himself has been tested."
حَدَّثَنَا سَعِيدُ بْنُ عُفَيْرٍ، قَالَ: حَدَّثَنَا يَحْيَى بْنُ أَيُّوبَ، عَنِ ابْنِ زَحْرٍ، عَنْ أَبِي الْهَيْثَمِ، عَنْ أَبِي سَعِيدٍ قَالَ: لاَ حَلِيمَ إِلاَّ ذُو عَثْرَةٍ، وَلاَ حَكِيمَ إِلاَّ ذُو تَجْرِبَةٍ.
also referenced under: Book 30, Hadith 28 (In-Book) & Book 30, Hadith 565 (English)