478
Musnad AhmedIt was narrated that Humran said: Uthman was sitting in alMaqa"id. He called for water and did wudoo’, then he said: I saw the Messenger of Allah (ﷺ) doing wudoo" in this place where I am sitting then he said:
“whoever does wudoo’ as I have done, then gets up and prays two rak"ahs, his previous sins will be forgiven.” And the Messenger of Allah (ﷺ) said: "Do not become complacent."
Reference: Musnad Ahmad 478
Arabic/English book : Book 4, Hadith 478
Arabic/English book : Book 4, Hadith 478