Breakage of wudu from passing of urine, stool, or wind.
Ablution (wudu) can break from a number of reasons. It usually differs from different madh'habs, but one that is agreed with all scholars of Islam is the breakage of wudu from passing of urine, stool, or wind.
- Abu Huraira  narrated that the Messenger of Allah  said, "The prayer of a person who does Hadath (passes, urine, stool or wind) is not accepted till he performs (repeats) the ablution." A person from Hadaramout asked Abu Huraira, "What is 'Hadath'?" Abu Huraira replied, " 'Hadath' means the passing of wind from the anus."
[Bukhari - Book 1 - Volume 4 - Hadith 137]