Quran 4:86 — Women (Al-Nesa')
When greeted with a greeting, you shall respond with a better greeting or at least an equal one. GOD reckons all things.
[4:85] Whoever mediates a good deed receives a share of the credit thereof, and whoever mediates an evil work, incurs a share thereof. GOD controls all things.
[4:87] GOD: there is no god except He. He will surely summon you on the Day of Resurrection—the inevitable day. Whose narration is more truthful than GOD's?