Al-Shafi’i, may Allah have mercy on him, wrote in his poetry, “When I forgave and stopped holding malice against anyone, I relieved my soul of the worries of enmity.”
Source: Dīwān al-Shāfiʻī 31
قال الشافعي رحمه الله في شعره لَمَّا عَفَوْتُ وَلَمْ أحْقِدْ عَلَى أحَدٍ أرحتُ نفسي من همَّ العداواتِ
31 ديوان الشافعي