Ablutions (Wudu')

Bukhari :: Book 1 :: Volume 4 :: Hadith 213

Narrated 'Amr bin 'Amir:

Anas said, "The Prophet used to perform ablution for every prayer." I asked Anas, "What you used to do?' Anas replied, "We used to pray with the same ablution until we break it with Hadath."

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