Does sleeping while sitting break wudu?

Dear Brother / Sister,

Sleeping that makes man lose control of himself breaks wudu. It does not matter whether he sleeps lying on his side, on his back, face down or leaning on his elbow. Sleeping slightly in a way that one hears what people around him talking does not break wudu.

If a person falls when the thing that he leans on by sleeping is drawn, his wudu is invalidated since he fell asleep.

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