Abu Dawud
Clothing
Book Number: 027 / Hadith Number: 4105
Narated By Umm Salamah, Ummul Mu'minin : Safiyyah, daughter of Abu Ubayd, said: When the Apostle of Allah (pbuh) mentioned lower garment, Umm Salamah, wife of the Apostle of Allah (pbuh), asked him: And a woman, Apostle of Allah? He replied: She may hang down a span. Umm Salamah said: Still it (foot) will be uncovered. He said: Then a forearm's length, nor exceeding it.