النَّدامَةُ عَلَى العَفوِ أفضَلُ وأيسَرُ مِنَ النَّدامَةِ عَلَى العُقوبَةِ.

Regret for having pardoned someone is better and easier to bear than regret for having punished them.

al-Kafi, v. 2, p. 108, no. 6