Chapter on Purifying Clothes and Other Items From Impurities
Tahdhīb al-Aḥkām|Volume 1|Book 1|Chapter 12
وَبِهَذَا اَلْإِسْنَادِ عَنِ اَلْحُسَيْنِ بْنِ سَعِيدٍ عَنْ حَمَّادٍ عَنْ حَرِيزٍ عَنْ مُحَمَّدِ بْنِ مُسْلِمٍ عَنْ أَبِي عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ قَالَ: ذَكَرَ اَلْمَنِيَّ فَشَدَّدَهُ وَ جَعَلَهُ أَشَدَّ مِنَ اَلْبَوْلِ ثُمَّ قَالَ« إِنْ رَأَيْتَ اَلْمَنِيَّ قَبْلَ أَوْ بَعْدَ مَا تَدْخُلُ فِي اَلصَّلاَةِ فَعَلَيْكَ إِعَادَةُ اَلصَّلاَةِ وَ إِنْ أَنْتَ نَظَرْتَ فِي ثَوْبِكَ فَلَمْ تُصِبْهُ ثُمَّ صَلَّيْتَ فِيهِ ثُمَّ رَأَيْتَهُ بَعْدُ فَلاَ إِعَادَةَ عَلَيْكَ وَ كَذَلِكَ اَلْبَوْلُ».
With this chain of transmission, from Al-Husayn ibn Sa'id, from Hammad, from Hariz, from Muhammad ibn Muslim, from Abu Abdullah عليه السلام. He said:
Imam عليه السلام mentioned semen and emphasized its severity, considering it more serious than urine. Imam عليه السلام said: "If you see semen before or after entering the prayer, you must repeat the prayer. But if you examine your clothing and do not find it, then pray in it, and later you see it, there is no need to repeat the prayer. The same ruling applies to urine."
- Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 1, p. 268
- Ṣaḥīḥ al-Tahdhīb, p. 25