Forbearance and endurance as virtues of courage
Nahj al-Balāgha|Volume 1|Book 3|Chapter 460
٤٦٠. وَقَالَ (عليه السلام): الْحِلْمُ وَالْأَنَاةُ تَوْأَمَانِ يُنْتِجُهُمَا عُلُوُّ الْهِمَّةِ.
460. Amīr al-mu’minīn, peace be upon him, said: Forbearance and endurance are twins and they are the product of high courage.