فَإِن لَّمْ تَجِدُوا فِيهَآ أَحَدًا فَلَا تَدْخُلُوهَا حَتَّىٰ يُؤْذَنَ لَكُمْ ۖ وَإِن قِيلَ لَكُمُ ٱرْجِعُوا فَٱرْجِعُوا ۖ هُوَ أَزْكَىٰ لَكُمْ ۚ وَٱللَّهُ بِمَا تَعْمَلُونَ عَلِيمٌ

Fa-in lam tajidoo feeha ahadanfala tadkhulooha hatta yu/thanalakum wa-in qeela lakumu irjiAAoo farjiAAoo huwa azkalakum wallahu bima taAAmaloona AAaleem

And if you do not find anyone therein, do not enter them until permission has been given you. And if it is said to you, "Go back," then go back; it is purer for you. And Allāh is Knowing of what you do.