Sunan al-Nasa'i
The Book of Ghusl and Tayammum — Hadith #437
أَخْبَرَنَا عَلِيُّ بْنُ مَيْمُونٍ، قَالَ حَدَّثَنَا مَخْلَدُ بْنُ يَزِيدَ، عَنِ ابْنِ جُرَيْجٍ، عَنْ عَطَاءٍ، عَنِ ابْنِ عَبَّاسٍ، قَالَ تَذَاكَرَ عَلِيٌّ وَالْمِقْدَادُ وَعَمَّارٌ فَقَالَ عَلِيٌّ إِنِّي امْرَؤٌ مَذَّاءٌ وَإِنِّي أَسْتَحِي أَنْ أَسْأَلَ رَسُولَ اللَّهِ صلى الله عليه وسلم لِمَكَانِ ابْنَتِهِ مِنِّي فَيَسْأَلُهُ أَحَدُكُمَا فَذَكَرَ لِي أَنَّ أَحَدَهُمَا وَنَسِيتُهُ سَأَلَهُ فَقَالَ النَّبِيُّ صلى الله عليه وسلم
" ذَاكَ الْمَذْىُ إِذَا وَجَدَهُ أَحَدُكُمْ فَلْيَغْسِلْ ذَلِكَ مِنْهُ وَلْيَتَوَضَّأْ وُضُوءَهُ لِلصَّلاَةِ أَوْ كَوُضُوءِ الصَّلاَةِ " .
“Ali, Al-Miqdad and ‘Ammar were talking. ‘Ali said: ‘I am a man who emits a lot of Madhi but I am too shy to ask the Messenger of Allah (ﷺ) about that because of his daughter’s position with me, so let one of you ask him.’ He told me that one of them – but I forgot who – asked him, and the Prophet (ﷺ) said: ‘That is Madhi. If any one of you notices that, let him wash it off himself and perform Wudu’ as for prayer or similar to the Wudu’ of prayer.'”
Chain of Narration (Isnad)
Muhammad bin 'Abdul A'la محمد بن عبد الأعلى
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Khalid bin al-Harith bin 'Ubaid خالد بن الحارث بن عبيد
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Shu'bah bin al-Hajjaj شعبة بن الحجاج
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Sulaiman al-A'mash الأعمش / سليمان بن مهران
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al-Mandhir bin Ya'la al-Thauri منذر بن يعلى الثوري
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Muhammad bin 'Ali b. al-Hussain al-Baqir محمد بن علي بن الحسين بن علي ,الباقر
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Ali ibn Abi Talib