Chapter on Etiquettes of Causes Requiring Purification
Tahdhīb al-Aḥkām|Volume 1|Book 1|Chapter 3
وَ بِهَذَا اَلْإِسْنَادِ عَنْ حَمَّادٍ عَنْ حَرِيزٍ عَنِ اِبْنِ بُكَيْرٍ عَنْ أَبِي عَبْدِ اَللَّهِ عَ قَالَ:« لاَ بَأْسَ بِالْبَوْلِ فِي اَلْمَاءِ اَلْجَارِي».
And through this chain of narration, from Hammad, from Hariz, from Ibn Bukayr, from Abu Abdullah عليه السلام, said:
Imam عليه السلام said: 'There is no harm in urinating in running water.'
- Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 1, p. 46
- Ṣaḥīḥ al-Tahdhīb, p. 46