سُنَنُ ابْنِ مَاجَهْ
Sunan Ibn Majah 504
The Book of Purification and its Sunnah
Ablution from prostatic fluid
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا هُشَيْمٌ، عَنْ يَزِيدَ بْنِ أَبِي زِيَادٍ، عَنْ عَبْدِ الرَّحْمَنِ بْنِ أَبِي لَيْلَى، عَنْ عَلِيٍّ، قَالَ سُئِلَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ عَنِ الْمَذْىِ فَقَالَ فِيهِ الْوُضُوءُ وَفِي الْمَنِيِّ الْغُسْلُ .
It was narrated that 'Ali said: "The Messenger of Allah was asked about prostatic fluid and he said: 'For that ablution (is necessary), and for semen, bath is necessary.'"
Sunan Ibn Majah, 504Sahih (Darussalam)