Musnad Ahmad 1153:854

Sulayman ibn Dawud narrated to us, he said: Abd al-Rahman informed us, from Hisham ibn Urwah, from his father, from Aisha, she said: "The hair of the Messenger of Allah, may Allah bless him and grant him peace, was below the *jummah* (hair that reaches the earlobes) and above the *wafrah* (hair that reaches the earlobes)."