Humran reported,

He informed him that he saw Uthman bin Affan call for a vessel, then pour water over his hands three times and wash them. He then put his right hand into the vessel, rinsed his mouth, and drew water into his nose. He washed his face three times, and his arms up to the elbows three times. He then wiped his head and washed his feet three times, up to the ankles.Then he said, "The Messenger of Allah ﷺ said, 'Whoever performs ablution as I have performed it, then prays two units of prayer without letting his mind wander during them, his previous sins will be forgiven.'"

Bukhari 159

Sahih

حدثنا عبد العزيز بن عبد الله الأويسي قال حدثني إبراهيم بن سعد عن ابن شهاب أن عطاء بن يزيد أخبره أن

حمران مولى عثمان

أخبره أنه رأى عثمان بن عفان دعا بإناء فأفرغ على كفيه ثلاث مرار فغسلهما ثم أدخل يمينه في الإناء فمضمض واستنشق ثم غسل وجهه ثلاثا ويديه إلى المرفقين ثلاث مرار ثم مسح برأسه ثم غسل رجليه ثلاث مرار إلى الكعبين ثم قال قال رسول الله ﷺ من توضأ نحو وضوئي هذا ثم صلى ركعتين لا يحدث فيهما نفسه غفر له ما تقدم من ذنبه و

البخاري 159صحيح
Contents
Reference
Commentary
Ayat
Collection
Sahih Bukhari
Book
Wudu
Chapter
Performing wudu three times each
Numbering
Darussalam 159
Bukhari 159