Musnad Ahmad 25:1040

Abu Abd al-Rahman narrated to us, al-Mas'udi narrated to us, from al-Hakam, from Miqsam, from Ibn Abbas, who said: "The Messenger of Allah, peace and blessings of Allah be upon him, was praying, and two young girls came until they stood in front of him, at his head. He moved them aside, and gestured with his hands to his right and to his left."