It was narrated that 'Ali, may Allah be please with him, said: "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."
أَخْبَرَنَا مُحَمَّدُ بْنُ عَبْدِ الأَعْلَى، قَالَ حَدَّثَنَا خَالِدُ بْنُ الْحَارِثِ، قَالَ حَدَّثَنَا شُعْبَةُ، قَالَ أَخْبَرَنِي سُلَيْمَانُ الأَعْمَشُ، قَالَ سَمِعْتُ مُنْذِرًا، عَنْ مُحَمَّدِ بْنِ عَلِيٍّ، عَنْ عَلِيٍّ، - رضى الله عنه - قَالَ اسْتَحْيَيْتُ أَنْ أَسْأَلَ رَسُولَ اللَّهِ صلى الله عليه وسلم عَنِ الْمَذْىِ مِنْ أَجْلِ فَاطِمَةَ فَأَمَرْتُ ا…
It was narrated that 'Ali said: "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.'"