٢٤ : ٢٨
فَإِن لَّمۡ تَجِدُواْ فِيهَآ أَحَدٗا فَلَا تَدۡخُلُوهَا حَتَّىٰ يُؤۡذَنَ لَكُمۡۖ وَإِن قِيلَ لَكُمُ ٱرۡجِعُواْ فَٱرۡجِعُواْۖ هُوَ أَزۡكَىٰ لَكُمۡۚ وَٱللَّهُ بِمَا تَعۡمَلُونَ عَلِيمٞ
If you do not find anyone therein, do not enter it until you have been given permission. If you are told to go back, then go back; that is more proper for you. And Allah is All-Knowing of what you do.