Al-Kāfi - Volume 3 > Water of Bath Houses and Water Heated by the Sun’s Rays
Hadith #4

4ـ مُحَمَّدُ بْنُ يَحْيَى عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنْ أَبِي يَحْيَى الْوَاسِطِيِّ عَنْ بَعْضِ أَصْحَابِنَا عَنْ أَبِي الْحَسَنِ الْمَاضِي (عَلَيْهِ الْسَّلام) قَالَ سُئِلَ عَنْ مَجْمَعِ الْمَاءِ فِي الْحَمَّامِ مِنْ غُسَالَةِ النَّاسِ يُصِيبُ الثَّوْبَ قَالَ لاَ بَأْسَ.

4. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from abu Yahya al-Wasitiy from certain persons of our people who have said the following: “Abu al-Hassan, the one before, ‘Alayhi al-Salam, was asked about accumulated water in bathhouses used by people which pollutes clothes. He (the Imam) said, ‘It is not harmful.’”