Sayyiduna Uthman (may Allah be pleased with him) once said to those present with him, "Shall I not show you how the Prophet (peace and blessings of Allah be upon him) performed ablution?" The people said, "Why not!" So he called for water, rinsed his mouth three times, put water into his nose three times, washed his face three times, washed both his arms three times each, wiped his head, and washed his feet. Then he said, "Know that the ears are part of the head." Then he said, "I have demonstrated ablution before you exactly as the Prophet (peace and blessings of Allah be upon him) performed it, with great care."
Hadith Referenceمسند احمد / مسند الخلفاء الراشدين / 429
Hadith Gradingحکم دارالسلام:حديث صحيح، ولقول عثمان: (الأذنان من الرأس) شواهد مرفوعة، وهذا الإسناد ضعيف لجهالة الرجل من الأنصار وأبيه