Nahj al-Balāgha

Hadith 2016
forgiveness
رُوَيْداً إِنَّمَا هُوَ سَبٌّ بِسَبٍّ، أَوْ عَفْوٌ عَنْ ذَنْبٍ.
Wait a bit. There should either be abuse for abuse or else pardon from the offence.
Source: al-Sharīf al-Raḍī