This had led some to argue that the mandate of the Qur'an to wear hijab applied to the wives of Muhammad, and not women generally.
In recent times, wearing hijab in public has been required by law in Iran, Saudi Arabia and the Indonesian province of Aceh.
teach etiquette for male and female interactions, where khumūr is mentioned in reference to the clothing of Arab women in the 7th century, but there is no command to actually wear them in any specific way.
Hence he considers head-covering a preferable practice but not a directive of the sharia (law). They believe that the commandment to maintain modesty must be interpreted with regard to the surrounding society.
These include the Iraqi Shia Marja' (Grand Ayatollah) Ali al-Sistani; In nearly all Muslim cultures, young girls are not required to wear a ħijāb.
There is not a single agreed age when a woman should begin wearing a ħijāb—but in many Muslim cultures, puberty is the dividing line.
It has become tradition that Muslims in general, and Salafis in particular, believe the Qur'an demands women wear the garments known today as jilbāb and khumūr (the khumūr must be worn underneath the jilbāb).
However, Qur'an translators and commentators translate the Arabic into English words with a general meaning, such as veils, head-coverings and shawls.And say to the believing women that they should lower their gaze and guard their modesty; that they should not display their beauty and ornaments except what (must ordinarily) appear thereof; that they should draw their khimār over their breasts and not display their beauty except to their husband, their fathers, their husband's fathers, their sons, their husbands' sons, their brothers or their brothers' sons, or their sisters' sons, or their (Muslim) women, or the slaves whom their right hands possess, or male servants free of physical needs, or small children who have no sense of the shame of sex; and that they should not strike their feet in order to draw attention to their hidden ornaments.Those who harass believing men and believing women undeservedly, bear (on themselves) a calumny and a grievous sin. Enjoin your wives, your daughters, and the wives of true believers that they should cast their outer garments over their persons (when abroad): That is most convenient, that they may be distinguished and not be harassed.Hijab can also be used to refer to the seclusion of women from men in the public sphere, or it may denote a metaphysical dimension, for example referring to "the veil which separates man or the world from God".Most often, it is worn by Muslim women as a symbol of modesty and privacy.The Quran instructs both Muslim men and women to dress in a modest way, but there is disagreement on how these instructions should be interpreted.