There is in Hadis Sharif, Abu Hurairah (R) said, the Prophet (sm) said, ‘If you take a bath five times a day in the river in front of your house, will there be any dirt left on your body? They said no, there will be no rest. He said, the comparison of five times salat is exactly the same. By it Allah removes sins.
(Muttafaq alaih Bangla Hadith, Bukhari Hadis Sharif, Muslim Sharif)