Al-Kāfi - The Book of Taharat (Cleansing)

Al-Kāfi - The Book of Taharat (Cleansing) Chapter: Mixing of Rain Water with Urine, with Water Used for Taking Ghusl (bath) Because of Carnal Relations, Touching of One’s Cloth with Water Used for Washing Because of Urine َّدُ بْنُ يَحْيَى عَنْ أَحْ٠َاعِيلَ عَنْ بَعْضِ أَصْحَابِنَا عَنْ أَبِي الْحَسَنِ فِي طِينِ الْ٠َطَرِ أَنَّهُ لاَ بَأْسَ بِهِ أَنْ يُصِيبَ الثَّوْبَ ثَلاَثَةَ أَيَّا٠ٍ إِلاَّ أَنْ يُعْلَ٠َ أَنَّهُ قَدْ نَجَّسَهُ شَيْ‏ءٌ بَعْدَ الْ٠َطَرِ فَإِنْ أَصَابَهُ بَعْدَ ثَلاَثَةِ أَيَّا٠ٍ فَاغْسِلْهُ وَإِنْ كَانَ الطَّرِيقُ نَظِيفاً لَ٠4.

Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from Muhammad ibn ’Isma‘il from certain persons of our people who have said the following: “I once asked abu al-Hassan (a.s.), about soil which is found with rain water. He (the Imam) said, ‘It is not harmful up to three days unless it is found out to have become Najis (unclean) by something after rainfall.

If such drops sprinkle after three days, then you must wash, but if the road is clean, then you do not need to wash.’” رسل - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (13/44))