Uthman bin Affan reported,

He performed ablution, pouring water over his hands three times and washing them, then he rinsed his mouth and nose, then washed his face three times, then washed his right arm up to the elbow three times, then his left arm in the same way, then he wiped his head, then washed his right foot three times, then his left foot in the same way.Then he said, "I saw the Messenger of Allah ﷺ perform ablution like this ablution of mine," and he said, "Whoever performs ablution like this ablution of mine and then prays two units of prayer without letting his mind wander during them, his previous sins will be forgiven."

أخبرنا سويد بن نصر قال أنبأنا عبد الله عن معمر عن الزهري عن عطاء بن يزيد الليثي عن حمران بن أبان قال رأيت

عثمان بن عفان رضي الله عنه

توضأ فأفرغ على يديه ثلاثا فغسلهما ثم تمضمض واستنشق ثم غسل وجهه ثلاثا ثم غسل يديه اليمنى إلى المرفق ثلاثا ثم اليسرى مثل ذلك ثم مسح برأسه ثم غسل قدمه اليمنى ثلاثا ثم اليسرى مثل ذلك ثم قال رأيت رسول الله ﷺ توضأ نحو وضوئي ثم قال من توضأ نحو وضوئي هذا ثم صلى ركعتين لا يحدث نفسه فيهما بشيء غفر له ما تقدم من ذنبه