Chapter on Etiquettes of Causes Requiring Purification
Tahdhīb al-Aḥkām|Volume 1|Book 1|Chapter 3
وَبِهَذَا الْإِسْنَادِ عَنْ مُحَمَّدِ بْنِ أَحْمَدَ بْنِ يَحْيَى عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنِ الْبَرْقِيِّ عَنْ عَبْدِ اللَّهِ بْنِ سِنَانٍ عَنْ إِسْمَاعِيلَ بْنِ جَابِرٍ قَالَ سَأَلْتُ أَبَا عَبْدِ اللَّهِ عَلَيْهِ السَّلَامُ عَنِ الْمَاءِ الَّذِي لَا يُنَجِّسُهُ شَيْءٌ قَالَ كُرٌّ، قُلْتُ وَمَا الْكُرُّ؟ قَالَ ثَلَاثَةُ أَشْبَارٍ فِي ثَلَاثَةِ أَشْبَارٍ
And through this chain of narration, from Muhammad bin Ahmad bin Yahya, from Ahmad bin Muhammad, from Al-Barqi, from Abdullah bin Sinan, from Isma'il bin Jabir, who said:
I asked Abu Abdullah عليه السلام about the water that nothing can make impure. Imam عليه السلام said: 'A kurr.' I asked: 'And what is a kurr?' Imam عليه السلام said: 'Three handspans by three handspans.'
- Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 1, p. 44
- Ṣaḥīḥ al-Tahdhīb