وَاِذَا حُيِّيْتُمْ بِتَحِيَّۃٍ فَحَــيُوْا بِاَحْسَنَ مِنْھَاۗ اَوْ رُدُّوْھَا۰ۭ اِنَّ اللہَ كَانَ عَلٰي كُلِّ شَيْءٍ حَسِيْبًا۸۶
Waitha huyyeetum bitahiyyatin fahayyoo biahsana minha aw ruddooha inna Allaha kana AAala kulli shayin haseeban
When you are greeted with a greeting, then greet with one fairer, or repeat the same greeting. For God takes account of all things.