4:86
An-Nisa 86
Surah An-Nisa (النساء), verse 86 — reference 4:86. Arabic text with optional translation and free audio on Al-Qalam.
وَإِذَا حُيِّيتُم بِتَحِيَّةٍ فَحَيُّوا۟ بِأَحْسَنَ مِنْهَآ أَوْ رُدُّوهَآ ۗ إِنَّ ٱللَّهَ كَانَ عَلَىٰ كُلِّ شَىْءٍ حَسِيبًا
wa-idhā ḥuyyītum bitaḥiyyatin faḥayyū bi-aḥsana min'hā aw ruddūhā inna l-laha kāna ʿalā kulli shayin ḥasīban
And when you are greeted with a greeting, greet [in return] with one better than it or [at least] return it [in a like manner]. Indeed Allāh is ever, over all things, an Accountant.