Things which Invalidate the Ablution "wudhu"

329. Wudhu becomes void on account of the following seven things:

Passing of urine.
Excretion.
Passing wind from the rear.
A sleep, deep enough to restrict sight and hearing. However, if the eyes do not see anything, but the ears can hear, Wudhu does not become void.
Things on account of which a person loses his sensibility, like insanity, intoxication or unconsciousness.
Istihaza – which will be dealt with later.
Janabat, and, as a recommended precaution, every state which requires Ghusl.