(Divine Etiquette)
O you who believe, do not enter homes other than yours without permission from their inhabitants, and without greeting them. This is better for you, that you may take heed.
يٰأَيُّهَا الَّذينَ ءامَنوا لا تَدخُلوا بُيوتًا غَيرَ بُيوتِكُم حَتّىٰ تَستَأنِسوا وَتُسَلِّموا عَلىٰ أَهلِها ذٰلِكُم خَيرٌ لَكُم لَعَلَّكُم تَذَكَّرونَ
yaaa aiyuhal lazeena aamanoo laa tadkhuloo buyootan ghaira buyootikum hatta tastaanisoo wa tusallimoo ‘allaa ahlihaa; zaalikum khairul lakum la’allakum tazakkaroon