Musannaf Ibn Abi Shayba 3:2547

Abu Bakr narrated to us, he said: Hushaym narrated to us, he said: Abu Bishr informed us, from Sa'id ibn Jubayr, from Ibn Abbas, he said: I spent a night at the house of Maymunah bint al-Harith. The Prophet, may Allah bless him and grant him peace, stood up to pray during the night, so I stood on his left. He took hold of a lock of hair that I had, or my head, and moved me to his right.