In Surah 24: 31(Ayah), the Qur'an advises women to cover their "adornments" from strangers outside the family. In the traditional and modern Arab societies women at home dress quite differently compared to what they wear in the streets. In this verse of the Qur'an, it refers to the institution of a new public modesty rather than veiling the face
When the pre-Islamic Arabs went to battle, Arab women seeing the men off to war would bare their breasts to encourage them to fight; or they would do so at the battle itself, as in the case of the Meccan women led by Hind at the Battle of Uhud. This changed with Islam, but the general use of the veil to cover the face did not appear until 'Abbasid times. Nor was it entirely unknown in Europe, for the veil permitted women the freedom of anonymity. None of the legal systems actually prescribe that women must wear a veil, although they do prescribe covering the body in public, up to the neck, the ankles, and below the elbow. In many Muslim societies, for example in traditional South East Asia, or in Bedouin lands a face veil for women is either rare or non-existent; paradoxically, modern fundamentalism is introducing it. In others, the veil may be used at one time and European dress another. While modesty is a religious prescription, the wearing of a veil is not a religious requirement of Islam, but a matter of cultural milieu
"The Middle Eastern norm for relationships between the sexes is by no means the only one possible for Islamic societies everywhere, nor is it appropriate for all cultures. It does not exhaust the possibilities allowed within the framework of the Qur'an and Sunnah, and is neither feasible nor desirable as a model for Europe or North America. European societies possess perfectly adequate models for marriage, the family, and relations between the sexes which are by no means out of harmony with the Qur'an and the Sunnah. This is borne out by the fact that within certain broad limits Islamic societies themselves differ enormously in this respect." --