If you find no one in them, do not enter them until you obtain permission. If you are told, “Go back,” you must go back. This is purer for you. God is fully aware of everything you do.
فَإِن لَم تَجِدوا فيها أَحَدًا فَلا تَدخُلوها حَتّىٰ يُؤذَنَ لَكُم وَإِن قيلَ لَكُمُ ارجِعوا فَارجِعوا هُوَ أَزكىٰ لَكُم وَاللَّهُ بِما تَعمَلونَ عَليمٌ
fa il lam tajidoo feehaaa ahadan falaa tadkhuloohaa hattaa yu’zana lakum wa in qeela lakumurji’oo farji’oo huwa azkaa lakum; wallaahu bimaa ta’maloona ‘Aleem