Surah An-Nisa Verse 86 - English Translation by Shabbir Ahmed
Surah An-Nisaوَإِذَا حُيِّيتُم بِتَحِيَّةٖ فَحَيُّواْ بِأَحۡسَنَ مِنۡهَآ أَوۡ رُدُّوهَآۗ إِنَّ ٱللَّهَ كَانَ عَلَىٰ كُلِّ شَيۡءٍ حَسِيبًا
Good deeds that contribute to the well being of the society begin with kindness (2:177). When someone greets you, respond with similar or more courteous greetings. Allah reckons all things. Anyone who contributes towards peace and betterment of life, do as much or better for him