Musnad Ahmad 329:9

'Abd al-Razzaq narrated to us, he said: Malik informed us, from 'Amr ibn Yahya, from his father, from 'Abdullah ibn Zayd: "That the Prophet, peace and blessings of Allah be upon him, wiped his head with his two hands, moving them forward and backward. He began with the front of his head, then took them to the back of his head, then returned them until he reached the place from which he began."