ENOfficial
‘Ali said: I was a man who emitted a great deal of madhi and I felt too shy to ask the Prophet (ﷺ) because of his daughter, so I told al-Miqdad to ask him and he said: `Let him wash his private part and testicles and do wudoo’.
Source: sunnah.com
Other translations
Arabic
حَدَّثَنَا وَكِيعٌ، حَدَّثَنَا هِشَامُ بْنُ عُرْوَةَ، عَنْ أَبِيهِ، قَالَ قَالَ عَلِيٌّ كُنْتُ رَجُلًا مَذَّاءً وَكُنْتُ أَسْتَحِي أَنْ أَسْأَلَ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ لِمَكَانِ ابْنَتِهِ فَأَمَرْتُ الْمِقْدَادَ فَسَأَلَهُ فَقَالَ يَغْسِلُ ذَكَرَهُ وَأُنْثَيَيْهِ وَيَتَوَضَّأُ.
sunnah.com