Uthman ibn 'Affaan · The Book of Purification

"I heard Humran bin Aban tell Abu Burdah in the Masjid that he heard 'Uthman narrating that the Messenger of Allah (ﷺ) said: 'Whoever performs Wudu' completely as commanded by Allah, the five daily prayers will be an expiation for whatever comes in between them.'"

"I heard the Messenger of Allah (ﷺ) say: 'There is no man who performs Wudu' and does it well, then prays, but when he prays it, he will be forgiven whatever (sins he commits) between that and the next prayer."