Abu Dawud Book 14, Hadith Number 3125.

Narated By A woman who took oath of allegiance : Usayd ibn AbuUsayd, reported on the authority of a woman who took oath of allegiance (to the Prophet): One of the oaths which the Apostle of Allah (PBUH) received from us about the virtue was that we would not disobey him in it (virtue): that we would not scratch the face, nor wail, nor tear the front of the garments nor dishevel the hair.