Sunan Abi Dawud 211
سنن أبي داود#211Sahihحَدَّثَنَا إِبْرَاهِيمُ بْنُ مُوسَى، أَخْبَرَنَا عَبْدُ اللَّهِ بْنُ وَهْبٍ، حَدَّثَنَا مُعَاوِيَةُ، - يَعْنِي ابْنَ صَالِحٍ - عَنِ الْعَلاَءِ بْنِ الْحَارِثِ، عَنْ حَرَامِ بْنِ حَكِيمٍ، عَنْ عَمِّهِ عَبْدِ اللَّهِ بْنِ سَعْدٍ الأَنْصَارِيِّ، قَالَ سَأَلْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم عَمَّا يُوجِبُ الْغُسْلَ وَعَنِ الْمَاءِ يَكُونُ بَعْدَ الْمَاءِ فَقَالَ " ذَاكَ الْمَذْىُ وَكُلُّ فَحْلٍ يُمْذِي فَتَغْسِلُ مِنْ ذَلِكَ فَرْجَكَ وَأُنْثَيَيْكَ وَتَوَضَّأْ وُضُوءَكَ لِلصَّلاَةِ " .
Narrated Abdullah ibn Sa'd al-Ansari: I asked the Messenger of Allah (ﷺ) as to what makes it necessary to take a bath and about the (prostatic) fluid that flows after taking a bath. He replied: that is called madhi (prostatic fluid). It flows from every male. You should wash your private parts and testicles because of it and perform ablution as you do for prayer
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
In-book reference: 1:211