"I was a man who emotted a great deal of Madhi. I told a man to ask the Prophet ﷺ (about that) and he said: 'Wudu' (is required) for that."  

كُنْتُ رَجُلاً مَذَّاءً فَأَمَرْتُ رَجُلاً فَسَأَلَ النَّبِيَّ ﷺ فَقَالَ «فِيهِ الْوُضُوءُ»  

"I felt too shy to ask the Messenger of Allah ﷺ about Madhi because of Fatimah, so I told Al-Miqdad to ask him, and he said: 'Wudu' (is required) for that.'"  

أَنْ أَسْأَلَ رَسُولَ اللَّهِ ﷺ عَنِ الْمَذْىِ مِنْ أَجْلِ فَاطِمَةَ فَأَمَرْتُ الْمِقْدَادَ فَسَأَلَهُ فَقَالَ فِيهِ الْوُضُوءُ