Al-Mada’ini reported: It was said to Al-Ahnaf ibn Qays, may Allah have mercy on him, “What is manhood?” Al-Ahnaf said, “Forbearance at a time of anger, and forgiveness at a time of power.”
Source: al-Murū’ah 64
عن الْمَدَائِنِي قَالَ قِيلَ لِلْأَحْنَفِ بْنِ قَيْسٍ رحمه الله مَا الْمُرُوءَةُ فَقَالَ الْحِلْمُ عِنْدَ الْغَضَبِ وَالْعَفْوُ عِنْدَ الْقُدْرَةِ
64 المروءة لابن المرزبان