Musnad Abu Ya'la al-Mawsili 110:160

Abu Bakr narrated to us, Abdullah bin Idris narrated to us, from Ibn ‘Ajlan, from Zayd bin Aslam, from ‘Ata’ bin Yasar, from Ibn ‘Abbas: That the Prophet (peace be upon him) performed ablution. He scooped a handful of water and washed his face. Then he scooped a handful of water and washed his right hand. Then he scooped a handful of water and washed his left hand. Then he scooped a handful of water and wiped his head and his ears, [wiping] their insides with his two index fingers, and he placed his two thumbs behind the outsides of his ears, so he wiped their outsides and their insides. Then he scooped a handful of water and washed his right foot. Then he scooped a handful of water and washed his left foot.