Abu Dawud Book 1, Hadith Number 210.

Chapter : On prostatic fluid madhi.

Narated By Sahl ibn Hunayf : I felt greatly distressed by the frequent flowing of prostatic fluid. For this reason I used to take a bath very often. I asked the apostle of Allah (PBUH) about this. He replied: Ablution will be sufficient for you because of this. I asked: Apostle of Allah, what should I do if it smears my clothes. He replied: It is sufficient if you take a handful of water and sprinkle it on your clothe when you find it has smeared it.