Chapter on Purifying Clothes and Other Items From Impurities
Tahdhīb al-Aḥkām|Volume 1|Book 1|Chapter 12
فَأَمَّا مَا رَوَاهُ أَحْمَدُ بْنُ مُحَمَّدٍ عَنْ مُحَمَّدِ بْنِ إِسْمَاعِيلَ بْنِ بَزِيعٍ قَالَ: سَأَلْتُهُ عَنِ اَلْأَرْضِ وَ اَلسَّطْحِ يُصِيبُهُ اَلْبَوْلُ أَوْ مَا أَشْبَهَهُ هَلْ تُطَهِّرُهُ اَلشَّمْسُ مِنْ غَيْرِ مَاءٍ قَالَ« كَيْفَ تُطَهِّرُ مِنْ غَيْرِ مَاءٍ».
As for what was narrated by Ahmad bin Muhammad from Muhammad bin Isma'il bin Bazee’, who said:
I asked Imam عليه السلام about the ground or a roof that is affected by urine or something similar - does the sun purify it without water? Imam عليه السلام said: "How can it be purified without water?"
- Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 1, p. 289
- Ṣaḥīḥ al-Tahdhīb, p. 30