Sahih Bukhari

Narrated Abu Huraira:I heard Allah's Messenger (ﷺ) 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 (ﷺ) added, ""That is the example of the five prayers with which Allah blots out (annuls) evil deeds