Sahih Muslim
The Book of Prayers (Kitab Al-Salat)
Book Number: 004 / Hadith Number: 1411
Jabir b. 'Abdullah reported that the Messenger of Allah (may peace be upon him) said: The similitude of five prayers is like an overflowing river passing by the gate of one of you in which he washes five times daily Hasan said: No filthiness can remain on him.