وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ زَيْدِ بْنِ أَسْلَمَ، عَنْ جُنْدَبٍ، مَوْلَى عَبْدِ اللَّهِ بْنِ عَيَّاشٍ أَنَّهُ قَالَ سَأَلْتُ عَبْدَ اللَّهِ بْنَ عُمَرَ عَنِ الْمَذْىِ، فَقَالَ إِذَا وَجَدْتَهُ فَاغْسِلْ فَرْجَكَ وَتَوَضَّأْ وُضُوءَكَ لِلصَّلاَةِ ‏.‏

Yahya related to me from Malik from Zayd ibn Aslam from hisfather that Jundub, the mawla of Abdullah ibn Ayyash, said, "I askedAbdullah ibn Umar about prostatic fluid and he said, 'When you findit, wash your genitals and do wudu as for prayer.' " Translation Not Available

Book Ref: Muwatta Imam Malik Book 2 Hadith 87
Web Ref:  Muwatta Imam Malik Book 2 Hadith 57