Abu Dawud
Combing The Hair
Book Number: 028 / Hadith Number: 4153
Narated By 'Aisha, Ummul Mu'minin : When Hind, daughter of Utbah, said: Prophet of Allah, accept my allegiance, he replied; I shall not accept your allegiance till you make a difference to the palms of your hands; for they look like the paws of a beast of prey.