Ablutions (Wudu')

Bukhari :: Book 1 :: Volume 4 :: Hadith 178

Narrated 'Ali:

I used to get emotional urethral discharges frequently and felt shy to ask Allah's Apostle about it. So I requested Al-Miqdad bin Al-Aswad to ask (the Prophet ) about it. Al-Miqdad asked him and he replied, "On has to perform ablution (after it)."