وَعَنْ عَلِيِّ بْنِ أَبِي طَالِبٍ رضى الله عنه
قَالَ: «كُنْتُ رَجُلاً مَذَّاءً، فَأَمَرْتُ اَلْمِقْدَادَ بْنَ اَلْأَسْوَدِ أَنْ يَسْأَلَ اَلنَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَسَأَلَهُ ? فَقَالَ: «فِيهِ اَلْوُضُوءُ»
I was one who Madhi (urethral discharge) flowed readily and asked Miqdad (his slave) to ask the Prophet (sallallahu alayhi wa sallam) about it. He (the Prophet (sallallahu alayhi wa sallam)) said: “One should perform Wudu (ablution) in this case”.
Bulugh al-Maram 82, Book 1, The Book of Purification, Hadith 82. 1 min read