(61) باب فَرْقِ الشَّعْرِ
It was narrated from Ibn 'Abbas that:
The Messenger of Allah [SAW] used to let his hair hang down (without a parting) and the Mushrikun used to part their hair. The Messenger of Allah [SAW] liked to act in accordance with the People of the Book, in matters where no specific command had been given to him. Then the Messenger of Allah [SAW] parted his hair after that.
Reference: Sunan an-Nasa'i 5238
In-book reference: Book 48, Hadith 199
English translation: Vol. 6, Book 48, Hadith 5240