He heard the Messenger of Allah ﷺ say, "Tell me, if there were a river at the door of one of you in which he bathed five times every day, would any dirt remain on him?"They replied, "No dirt would remain on him at all."He said, "That is the likeness of the five daily prayers. Through them Allah wipes away sins."
أنه سمع رسول الله ﷺ يقول: أرأيتم لو أن نهرا بباب أحدكم يغتسل فيه كل يوم خمسا، ما تقول ذلك، يبقي من درنه؟ قالوا: لا يبقي من درنه شيئا، قال: فذلك مثل الصلوات الخمس؛ يمحو الله به الخطايا.
Bukhari narrated it in the Book of Prayer Times, and this is his wording (528), and Muslim narrated it in the Book of Mosques (667), both through the route of Yazid bin Had, from Muhammad bin Ibrahim, from Abu Salama bin Abdul-Rahman, from Abu Hurairah, who related the hadith.In another version, "The five prayers are like a flowing river at one's door, in which he bathes five times every day. What would remain of his filth?"Ahmad narrated it (9692) through another sahih route from Abu Hurairah.