Chapter on Etiquettes of Causes Requiring Purification
Tahdhīb al-Aḥkām|Volume 1|Book 1|Chapter 3
وَبِهَذَا الْإِسْنَادِ عَنْ الْحُسَيْنِ بْنِ سَعِيدٍ عَنْ حَمَّادٍ عَنْ رِبْعِيٍّ عَنْ الْفُضَيْلِ عَنْ أَبِي عَبْدِ اللَّهِ عَلَيْهِ السَّلَامُ قَالَ: لَا بَأْسَ أَنْ يَبُولَ الرَّجُلُ فِي الْمَاءِ الْجَارِي، وَكَرِهَ أَنْ يَبُولَ فِي الْمَاءِ الرَّاكِدِ.
And through this chain of narration, from Al-Husayn bin Sa'id, from Hammad, from Rabi'i, from Al-Fudayl, from Abu Abdullah عليه السلام, who said:
Imam عليه السلام said: 'There is no harm for a man to urinate in running water, but it is disliked for him to urinate in stagnant water.'
- Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 1, p. 46
- Ṣaḥīḥ al-Tahdhīb