Al-Imām al-Bukhārī - upon whom be mercy - narrates: Qutaybah ibn Sa’īd reported to us; he said: Jarīr reported to us, from al-A’mash, from al-Mundhir Abū Ya’lā al-Thawrī, from Muḥammad ibn al-Ḥanafiyyah, who said:

‘Alī ibn Abī Ṭālib - may Allāh Almighty be content with him - said: “I was a person who experienced a great deal of madhī (pre-seminal fluid). Out of modesty, I felt shy to ask the Messenger of Allāh ﷺ about it. So I asked al-Miqdād ibn al-Aswad - may Allāh Almighty be content with him - to question him on my behalf. The Messenger of Allāh ﷺ replied: ‘For it, Wudū’ is required.’