SHAFAQNA – Abu Baseer narrated from Imam Baqer (AS) who narrated from the Prophet of Islam (PBUH) saying: If there is a river next to your doorstep and you wash yourself five times a day in it, will there be any dirt remaining on your body? The narrator replied: No; then the Prophet (PBUH) continued by saying: Salaat is like a flowing river. Whenever a person stand to Salaat, his/her sins committed between two Salaats will be covered (concealed) .
 Wasaelul Shia, Vol. 3, Page 7.