Chapter on Water and Its Rules
Tahdhīb al-Aḥkām|Volume 1|Book 1|Chapter 21
أَحْمَدُ بْنُ مُحَمَّدِ بْنِ الْهَيْثَمِ بْنِ أَبِي مَسْرُوقٍ عَنِ الْحُكْمِ بْنِ مِسْكِينٍ عَنْ مُحَمَّدِ بْنِ مَرْوَانَ عَنْ أَبِي عَبْدِ اللهِ عَلَيْهِ السَّلَامُ قَالَ: لَوْ أَنَّ مِيزَابَيْنِ سَالَا، مِيزَابٌ بِبَوْلٍ وَمِيزَابٌ بِمَاءٍ فَاخْتَلَطَا، ثُمَّ أَصَابَكَ مَا كَانَ بِهِ بَأْسٌ.
Ahmad ibn Muhammad ibn Al-Haytham ibn Abi Masruq, from Al-Hakam ibn Miskin, from Muhammad ibn Marwan, narrated from Abu Abdullah عليه السلام:
Imam عليه السلام said: "If two spouts were to flow - one carrying urine and the other carrying water - and they mixed, then if something from it touches you, there is no harm."
- Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 1, p. 436
- Ṣaḥīḥ al-Tahdhīb