Self-discipline through empathy and restraint
Nahj al-Balāgha|Volume 1|Book 3|Chapter 412
٤١٢. وَقَالَ (عليه السلام): كَفَاكَ أَدَباً لِنَفْسِكَ اجْتِنَابُ مَا تَكْرَهُهُ مِنْ غَيْرِكَ.
412. Amīr al-mu’minīn, peace be upon him, said: It is enough for your own discipline that you abstain from what you dislike from others.