النّور — An-Nur Ayat 27
يٰٓاَيُّهَا الَّذِيْنَ اٰمَنُوْا لَا تَدْخُلُوْا بُيُوْتًا غَيْرَ بُيُوْتِكُمْ حَتّٰى تَسْتَأْنِسُوْا وَتُسَلِّمُوْا عَلٰٓى اَهْلِهَاۗ ذٰلِكُمْ خَيْرٌ لَّكُمْ لَعَلَّكُمْ تَذَكَّرُوْنَ
Yā ayyuhal-lażīna āmanū lā tadkhulū buyūtan gaira buyūtikum ḥattā tasta'nisū wa tusallimū ‘alā ahlihā, żālikum khairul lakum la‘allakum tażakkarūn(a).
"O you who have believed, do not enter houses other than your own houses until you ascertain welcome and greet their inhabitants. That is best for you; perhaps you will be reminded."