Sahih al-Bukhari 132
Book 3: Knowledge · Narrated by `Ali
Arabic
حَدَّثَنَا مُسَدَّدٌ، قَالَ حَدَّثَنَا عَبْدُ اللَّهِ بْنُ دَاوُدَ، عَنِ الأَعْمَشِ، عَنْ مُنْذِرٍ الثَّوْرِيِّ، عَنْ مُحَمَّدٍ ابْنِ الْحَنَفِيَّةِ، عَنْ عَلِيٍّ، قَالَ كُنْتُ رَجُلاً مَذَّاءً فَأَمَرْتُ الْمِقْدَادَ أَنْ يَسْأَلَ النَّبِيَّ صلى الله عليه وسلم فَسَأَلَهُ فَقَالَ " فِيهِ الْوُضُوءُ ".
English translation
Narrated `Ali:I used to get the emotional urethral discharge frequently so I requested Al-Miqdad to ask the Prophet (ﷺ) about it. Al-Miqdad asked him and he replied, "One has to perform ablution (after it)." (See Hadith No)
Reference: Sahih al-Bukhari 132, Book of Knowledge. English translation by Dr. Muhammad Muhsin Khan.