Answer: The Prophet (may Allah’s peace and blessings be upon him) said: "When a Muslim - or a believer - performs ablution and washes his face, every single sin that he committed with his eyes will be washed away from his face with water, or with the last drop of water. When he washes his hands, every single sin that he committed with his hands will be washed away from his hands with water, or with the last drop of water. When he washes his feet, every single sin that he committed with his feet will be washed away from his feet with the water, or with the last drop of water, until he finally becomes purified from all his sins." [Narrated by Muslim]