Uthman came to the seating area and called for water for ablution. He rinsed his mouth, snuffed water into his nose, then washed his face three times, and his hands three times each. Then he wiped his head and washed his feet three times each.Then he said to a group of the companions of the Messenger of Allah ﷺ who were with him, "I saw the Messenger of Allah ﷺ perform ablution like this. Is that not so?"They replied, "Yes."
حدثنا ابن الأشجعي حدثنا أبي عن سفيان عن سالم أبي النضر
أتى عثمان المقاعد فدعا بوضوء فتمضمض واستنشق ثم غسل وجهه ثلاثا ويديه ثلاثا ثلاثا ثم مسح برأسه ورجليه ثلاثا ثلاثا ثم قال رأيت رسول الله ﷺ هكذا يتوضأ يا هؤلاء أكذاك قالوا نعم لنفر من أصحاب رسول الله ﷺ عنده
No references are available.
Its chain of transmission is sahih. Ibn Ashjaee is Abu Ubayda bin Ubaydullah bin Abdul-Rahman, and he is trustworthy.His father, Ubaydullah bin Abdul-Rahman, with Ubayd in the diminutive form in both names, al-Ashjaee, was trustworthy and reliable. He was the most knowledgeable person regarding the hadith of Sufyan Thawri, as Ibn Main said.Busr bin Saeed was a successor, a devout worshipper and an ascetic. He died in the year 100 AH at the age of 78.See what came before this, and 404, 419, 421, 429, 477, 478.