وَإِذَا حُيِّيْتُم بِتَحِيَّةٍ فَحَيُّواْ بِأَحْسَنَ مِنْهَا أَوْ رُدُّوهَا إِنَّ اللّهَ كَانَ عَلَى كُلِّ شَيْءٍ حَسِيبًا
﴿٨٦﴾
سورة النساء
(4/86) And when you are greeted with a greeting, greet with a better greeting than it or return it in a like manner. Surely Allah is the Best Accountant over all things.
Surah An-Nisa