Narrated Abu Huraira: I heard Allah's Apostle saying, If there was a river at the door of anyone of you and he took a bath in it five times a day would you notice any dirt on him? They said, Not a trace of dirt would be left.The Prophet added, That is the example of the five prayers with which Allah blots out (annuls) evil deeds.(Sahih Bukhari, Book 10, Number 506)

Narrated Anas: The Prophet said, "Whenever anyone of you offers his prayer he is speaking in private to his Lord. So he should not spit to his right but under his left foot." Qatada said, "He should not spit in front of him but to his left or under his feet." And Shu'ba said, "He should not spit in front of him, nor to his right but to his left or under his foot." Anas said: The Prophet said, "He should neither spit in the direction of his Qibla nor to his right but to his left or under his foot." (Sahih Bukhari, Book 10, Number 508)

Narrated Ibn 'Umar: Allah's Apostle said, "Whoever misses the 'Asr prayer (intentionally) then it is as if he lost his family and property." ." (Sahih Bukhari, Book 10, Number 527)