"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