Abu Dawud
Purification (Kitab Al-Taharah)
Book Number: 001 / Hadith Number: 121
Narated By Al-Miqdam ibn Ma'dikarib al-Kindi : The ablution water was brought to the Messenger (pbuh) and he performed ablution; he washed his hands up to wrists three times, then washed his forearms three times. He then rinsed his mouth and snuffed up water three times; then he wiped his head and ears inside and outside.