Musnad Ahmad 1163:0

Narrated Maymunah bint al-Harith al-Hilaliyyah, the wife of the Prophet, may Allah bless him and grant him peace: The Messenger of Allah, may Allah bless him and grant him peace, performed ablution for prayer. He washed his hands three times, then he poured water with his right hand over his left, and washed his private parts. Then he struck his hand upon the earth, wiped it, and washed it. Then he rinsed his mouth and washed his nose. Then he washed his face and his forearms. Then he poured water over his head. Then he moved aside from that place and washed his feet. Then he was brought a cloth, but he did not want it, so he began to shake the water off with his hands.