Hisham ibn 'Urwa reported that his father said, "I was sitting with Mu'awiya and he muttered to himself and then came to his senses. [This is when he was ill.] He said, 'No one has forbearance without it being put to the test.' He repeated that three times."  

عَنْ أَبِيهِ قَالَ كُنْتُ جَالِسًا عِنْدَ مُعَاوِيَةَ فَحَدَّثَ نَفْسَهُ ثُمَّ انْتَبَهَ فَقَالَ لاَ حِلْمَ إِلاَّ تَجْرِبَةٌ يُعِيدُهَا ثَلاثًا  

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."  

عَنْ أَبِي سَعِيدٍ قَالَ لاَ حَلِيمَ إِلاَّ ذُو عَثْرَةٍ وَلاَ حَكِيمَ إِلاَّ ذُو تَجْرِبَةٍ