Man Lā Yaḥḍuruh al-Faqīh
Hadith 727727 - وَ سَأَلَ عَلِيُّ بْنُ جَعْفَرٍ أَخَاهُ مُوسَى بْنَ جَعْفَرٍ عَلَيْهِمَا اَلسَّلاَمُ: عَنِ اَلصَّلاَةِ فِي بَيْتِ اَلْحَمَّامِ فَقَالَ «إِذَا كَانَ اَلْمَوْضِعُ نَظِيفاً فَلاَ بَأْسَ بِالصَّلاَةِ» يَعْنِي اَلْمَسْلَخَ.
Hadith.727 - Ali ibn Ja'far asked his brother Imam Musa ibn Jafar Al-Kadhim (as) about praying in the bathhouse.
Imam (as) said: "If the place is clean, then there is no harm in praying, referring specifically to the changing area (maslakh).”