ٱدۡفَعۡ بِٱلَّتِى هِىَ أَحۡسَنُ ٱلسَّيِّئَةَۚ نَحۡنُ أَعۡلَمُ بِمَا يَصِفُونَ (٩٦)
Repel evil with that which is better. We are best aware of that which they allege. (96)
TAFSEER BY DR FARHAT HASHMI
Allah Subhanawataala asks us to repel evil with what is better.
What stops us from being good to someone who is being evil to us.? It is the whisperings of Shaytaan that say: “if you let it go, and do not retaliate then this person will overcome you”
Thus use the dua for protection from Shaytaan in 23:97-98