We were with "Uthman bin "Affan (رضي الله عنه), he called for water and did wudoo’. When he had finished his wudoo", he smiled and said: Do you know why I smiled? He said: The Messenger of Allah (ﷺ) did wudoo" as I just did wudoo", then he smiled and said: “Do you know why I smiled?" we said: Allah and His Messenger know best. He said: “If a person does wudoo and completes his wudoo’, then he starts to pray and completes his prayer, he will come out of his prayer free of sin as he came out of his mother"s womb.”