Sunan Abi Dawud, Book 31, Hadith 4000 (USC-MSA) ⓘ
Narrated Abdullah ibn Amr ibn al-'As: The Prophet said: After some time the lands of the non-Arabs will be conquered for you, and there you will find houses called hammamat (hot baths). so men should not enter them (to wash) except in lower garments, and forbid the women to enter them except a sick or one who is in a child-bed.
حَدَّثَنَا أَحْمَدُ بْنُ يُونُسَ، حَدَّثَنَا زُهَيْرٌ، حَدَّثَنَا عَبْدُ الرَّحْمَنِ بْنُ زِيَادِ بْنِ أَنْعَمَ، عَنْ عَبْدِ الرَّحْمَنِ بْنِ رَافِعٍ، عَنْ عَبْدِ اللَّهِ بْنِ عَمْرٍو، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " إِنَّهَا سَتُفْتَحُ لَكُمْ أَرْضُ الْعَجَمِ وَسَتَجِدُونَ فِيهَا بُيُوتًا يُقَالُ لَهَا الْحَمَّامَاتُ فَلاَ يَدْخُلَنَّهَا الرِّجَالُ إِلاَّ بِالأُزُرِ وَامْنَعُوهَا النِّسَاءَ إِلاَّ مَرِيضَةً أَوْ نُفَسَاءَ " .
also referenced under: Hadith 4011 (DarusSalam) & Hadith 4000 (Hasan)