"The Messenger of Allah ﷺ said: 'You will conquer the lands of the non-Arabs, where you will find houses called Hammamat (bathhouses). Men Should only enter them wearing a waist wrap, and do not let women enter them unless they are sick or bleeding following childbirth."  

قَالَ رَسُولُ اللَّهِ ﷺ تُفْتَحُ لَكُمْ أَرْضُ الأَعَاجِمِ وَسَتَجِدُونَ فِيهَا بُيُوتًا يُقَالُ لَهَا الْحَمَّامَاتُ فَلاَ يَدْخُلْهَا الرِّجَالُ إِلاَّ بِإِزَارٍ وَامْنَعُوا النِّسَاءَ أَنْ يَدْخُلْنَهَا إِلاَّ مَرِيضَةً أَوْ نُفَسَاءَ  

forbade men and women to enter bathhouses, then he allowed men to enter them wearing a waist wrap, but he did not make the same allowance for women.  

وَكَانَ قَدْ أَدْرَكَ النَّبِيَّ ﷺ عَنْ عَائِشَةَ أَنَّ النَّبِيَّ ﷺ نَهَى الرِّجَالَ وَالنِّسَاءَ مِنَ الْحَمَّامَاتِ ثُمَّ رَخَّصَ لِلرِّجَالِ أَنْ يَدْخُلُوهَا فِي الْمَيَازِرِ وَلَمْ يُرَخِّصْ لِلنِّسَاءِ  

"Perhaps you are among those (women) who enter bathhouses? I heard the Messenger of Allah ﷺ say: 'Any woman who takes off her clothes anywhere but in her husband's house, has torn the screen between her and Allah.'"  

أَنَّ نِسْوَةً مِنْ أَهْلِ حِمْصَ اسْتَأْذَنَّ عَلَى عَائِشَةَ فَقَالَتْ لَعَلَّكُنَّ مِنَ اللَّوَاتِي يَدْخُلْنَ الْحَمَّامَاتِ سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ أَيُّمَا امْرَأَةٍ وَضَعَتْ ثِيَابَهَا فِي غَيْرِ بَيْتِ زَوْجِهَا فَقَدْ هَتَكَتْ سِتْرَ مَا بَيْنَهَا وَبَيْنَ اللَّهِ