Musnad Ahmad 436 — Musnad of Uthman ibn Affan

Muhammad bin Abdullah says that I came to Ibn Darah, the freed slave of Sayyiduna Uthman (may Allah be pleased with him). He heard the sound of me rinsing my mouth and called me by name. I replied, "Labbaik." He said, "Shall I not show you the way of ablution (wudu) as the Prophet (peace and blessings be upon him) did?" I saw Sayyiduna Uthman (may Allah be pleased with him) performing ablution while sitting on a bench, in which he rinsed his mouth three times, put water into his nose three times, washed his face three times, washed both arms three times each, wiped his head three times (and according to most narrations, once), and washed his feet. Then he said, "Whoever wants to see the way of ablution of the Prophet (peace and blessings be upon him), let him know that the Prophet (peace and blessings be upon him) used to perform ablution in this manner."