An Nur Ayah 28

فَإِن لَّمْ تَجِدُواْ فِيهَآ أَحَدًا فَلَا تَدْخُلُوهَا حَتَّىٰ يُؤْذَنَ لَكُمْ‌ۖ وَإِن قِيلَ لَكُمُ ٱرْجِعُواْ فَٱرْجِعُواْ‌ۖ هُوَ أَزْكَىٰ لَكُمْ‌ۚ وَٱللَّهُ بِمَا تَعْمَلُونَ عَلِيمٌ ٢٨ If you find no one at home, do not enter it until you have been given permission. And if you are asked to leave, then leave. That is purer for you. And Allah has ?perfect? knowledge of what you do.