Sunan At-Tirmidhi
Hadith #115
Sahl bin Hunaif said:""I suffered from a severe and troubling case of Al-Madhi. I was performing Ghusl often because of it. So I mentioned that to Allah's Messenger and asked him about it. He said: ""You only need to perform Wudu for that."" I said: ""O Messenger of Allah! How about when it gets on my clothes?"" He said: ""It is sufficient for you to take a handful of water and sprinkle it n your garment wherever you see that it has touched it