Mansur ibn Abi Muzahim and Muhammad ibn Ja'far ibn Ziyad narrated to us—Mansur said: narrated to us, and Ibn Ja'far said: informed us—Ibrahim, meaning Ibn Sa'd, from Ibn Shihab, from Ubayd Allah ibn Abd Allah, from Ibn Abbas, who said: The People of the Book used to let their hair hang down over their foreheads, while the polytheists used to part their hair. The Messenger of Allah, peace and blessings be upon him, loved to concur with the People of the Book in matters in which he had not been commanded [otherwise]. So the Messenger of Allah, peace and blessings be upon him, let his forelock hang down, then he parted his hair afterward.