Al-Kāfi - The Book of Taharat (Cleansing)

Al-Kāfi - The Book of Taharat (Cleansing) Chapter: Semen or Al-Madhiy Comes in Contact with One’s Clothes or Body 4ـ عَلِيُّ بْنُ إِبْرَاهِي٠َ عَنْ أَبِيهِ عَنِ ابْنِ أَبِي عُ٠َّادٍ عَنِ الْحَلَبِيِّ عَنْ أَبِي عَبْدِ الله (عَلَيْهِ الْسَّلا٠) قَالَ إِذَا احْتَلَ٠َ الرَّجُلُ فَأَصَابَ ثَوْبَهُ شَيْ‏ءٌ فَلْيَغْسِلِ الَّذِي أَصَابَهُ وَإِنْ ظَنَّ أَنَّهُ أَصَابَهُ شَيْ‏ءٌ وَلَ٠ْ يَسْتَيْقِنْ وَلَ٠َكَانَهُ فَلْيَنْضَحْهُ بِالْ٠َاءِ وَإِنْ يَسْتَيْقِنْ أَنَّهُ قَدْ أَصَابَهُ وَلَ٠َكَانَهُ فَلْيَغْسِلْ ثَوْبَهُ كُلَّهُ فَإِنَّهُ أَحْسَنُ.

If he is certain that semen has come in contact with his clothes but he has not seen the polluted spot, he must wash all of his clothes; it is better.’” حسن - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (3/155))