Sayyiduna Abu Huraira (may Allah be pleased with him) narrates: I heard the Prophet (peace and blessings be upon him) saying: "What do you think, if there were a river flowing at the door of one of you and he bathed in it five times a day, what would you say about that? Would any dirt remain on him?" The people replied: "No dirt would remain on him at all." The Prophet (peace and blessings be upon him) said: "This is the example of the five prayers through which Allah wipes away sins."
Hadith Referenceصحیح ابن حبان / كتاب الصلاة / 1726
Hadith Gradingفضيلة الشيخ الإمام محمد ناصر الدين الألبانيصحيح - انظر ما قبله.فضيلة الشيخ العلّامة شُعيب الأرناؤوطإسناده صحيح على شرطهما، قتيبة: هو ابن سعيد، وابن الهاد: هو يزيد بن عبد الله بن أسامة بن الهاد، ومحمد بن إبراهيم: هو التيمي.