What Defiles Clothing and the Body
Man Lā Yaḥḍuruh al-Faqīh|Volume 1|Book 1|Chapter 17
وَ رُوِيَ: «أَنَّ اَلْمَذْيَ وَ اَلْوَذْيَ بِمَنْزِلَةِ اَلْبُصَاقِ وَ اَلْمُخَاطِ فَلاَ يُغْسَلُ مِنْهُمَا اَلثَّوْبُ وَ لاَ اَلْإِحْلِيلُ.
It has been narrated that pre-seminal fluid (madhi) and post-urinal fluid (wadhi) are akin to saliva and mucus, so neither the garment nor the private parts need to be washed because of them.
- Ṣaḥīḥ al-Faqīh