Sunan Abu Dawood, Chapter: Purification (Kitab Al-Taharah)

My prostatic fluid flowed excessively. I used to take a bath until my back cracked (because of frequent washing). I mentioned it to the Prophet (may peace be upon him), or the fact was mentioned to him (by someone else). The Apos-tle of Allah (may peace be upon him) said: Do not do so. When you find pro-static fluid, wash your penis and perform ablution as you do for prayer, but when you have seminal emission, you should take a bath."