"Karima bint Ahmad (d. 1069) and Fatima bint Ali (d. 1087), for example, are regarded as two of the most important transmitters of the Prophet's traditions, while Zaynab bint al-Sha'ri (d. 1220) and Daqiqa bint Murshid (d. 1345), both textual scholars, occupied an eminent place in early Islamic scholarship. And it is hard to ignore the fact that nearly one sixth of all "reliable" hadith can be traced back to Muhammad's wife Aisha."