It was narrated from Mu`adh bin ‘Abdur-Rahman at Taimi, from Humran the freed slave of `Uthman (رضي الله عنه), from `Uthman (رضي الله عنه), that he said:
I heard the Messenger of Allah (ﷺ) say: “Whoever does wudoo` and does it properly, then goes and offers an obligatory prayer, his sins will be forgiven.`