811
Musnad AhmedIt was narrated that
"Ali bin Abi Talib (رضي الله عنه) said: When the issue of madhi bothered me a great deal, I told al-Miqdad to ask the Messenger of Allah (ﷺ) about it, and he said: "Wudoo" is due for it." He felt shy [to ask about this matter] because of Fatimah.
Reference: Musnad Ahmad 811
Arabic/English book : Book 5, Hadith 811
Arabic/English book : Book 5, Hadith 811