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.' "
USC-MSA web (English) reference: Book 2, Hadith 57
Arabic reference: Book 2, Hadith 87