Narrated `Ali: I used to get the emotional urethral discharge frequently so I requested Al-Miqdad to ask the Prophet about it. Al-Miqdad asked him and he replied, "One has to perform ablution (after it)." (See Hadith No. 269).
Hadith Referenceصحيح البخاري / كتاب العلم / 132
Hadith Gradingمحدثین:أحاديث صحيح البخاريّ كلّها صحيحة