Narrated Abu Hurairah:
that the Messenger of Allah (ﷺ) said: "Do you think that if there was a river by the gate of one of you, and he bathed in it five times each day that there would remain any filth on him?" They said: "No filth would stay on him." He said: "That is the parable of the five prayers, Allah wipes out the sins with them." (FR)
English reference (FR): Vol. 5, Book 42, Hadith 2868 (FR)
Arabic reference (FR): Book 44, Hadith 3107 (FR)