Musnad Abu Ya'la al-Mawsili 149:57

'Abd al-'Aziz narrated to us, Ibrahim bin Sa'd narrated to me, from Muhammad bin Ishaq, from Yahya bin 'Abbad, from his father, from 'Aishah, she said: I used to part the hair of the Messenger of Allah (ﷺ) from the crown of his head, and I would let it hang down for him when I oiled his forelock.