سورة Az-Zukhruf 43:89

فَٱصْفَحْ عَنْهُمْ وَقُلْ سَلَـٰمٌۭ ۚ فَسَوْفَ يَعْلَمُونَ ٨٩

So bear with them and respond with peace. They will soon come to know