Man Lā Yaḥḍuruh al-Faqīh
Hadith 75 - وَ سُئِلَ عَلَيْهِ اَلسَّلاَمُ: عَنْ طِينِ اَلْمَطَرِ يُصِيبُ اَلثَّوْبَ فِيهِ اَلْبَوْلُ وَ اَلْعَذِرَةُ وَ اَلدَّمُ فَقَالَ «طِينُ اَلْمَطَرِ لاَ يُنَجِّسُ.
Hadith.5 - Imam Jafar ibn Muhammad Al-Sadiq (as) was asked about rain-soaked mud that gets on clothes, which may contain urine, feces, and blood.
Imam (as) said: "Rain-soaked mud does not make (the clothes) impure”.