The virtue of pardoning adversaries when empowered
Nahj al-Balāgha|Volume 1|Book 3|Chapter 11
١١. وَقَالَ (عليه السلام): إِذَا قَدَرْتَ عَلَى عَدُوِّكَ فَاجْعَلِ الْعَفْوَ عَنْهُ شُكْراً لِلْقُدْرَةِ عَلَيْهِ.
11. Amīr al-mu’minīn, peace be upon him, said: When you gain power over your adversary pardon him by way of thanks for being able to overpower him. [1]