مسند أحمد

It was narrated that Humran said, `Uthman (رضي الله عنه) called for water when he was in al-Maqa`id. He poured some on his right hand and washed it, then he put his right hand in the vessel and washed his hands three times, then he washed his face three times, and he rinsed his mouth and nose, he washed his arms up to the elbows three times, then he wiped his head, then he washed his feet up to the ankles three times. Then he said: I heard the Messenger of Allah(ﷺ) say: “Whoever does wudoo` as I have done wudoo’, then prays two rak`ahs in which he does not let his mind wander, will be forgiven his previous sins.

It was narrated from Humran, the freed slave of ‘Uthman, that he saw `Uthman (رضي الله عنه) call for a vessel,... and he mentioned a similar report.