Chapter on Purifying Clothes and Other Items From Impurities
Tahdhīb al-Aḥkām|Volume 1|Book 1|Chapter 12
وَ بِهَذَا اَلْإِسْنَادِ عَنِ اَلْحُسَيْنِ بْنِ سَعِيدٍ عَنْ فَضَالَةَ عَنْ حَمَّادِ بْنِ عُثْمَانَ عَنِ اِبْنِ أَبِي يَعْفُورٍ قَالَ: سَأَلْتُ أَبَا عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ عَنِ اَلْبَوْلِ يُصِيبُ اَلثَّوْبَ فَقَالَ« اِغْسِلْهُ مَرَّتَيْنِ».
With this chain of transmission, from Al-Husayn ibn Sa'id, from Fadalah, from Hammad ibn Uthman, from Ibn Abi Ya'fur. He said:
I asked Abu Abdullah عليه السلام about urine that touches clothing. Imam عليه السلام said: "Wash it twice."
- Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 1, p. 267
- Ṣaḥīḥ al-Tahdhīb, p. 25