The Quranic basis
God commands believing women to lower their gaze, guard their chastity, not display adornment beyond what is apparent, and to draw their head-coverings over their chests:
وَقُل لِّلۡمُؤۡمِنَٰتِ يَغۡضُضۡنَ مِنۡ أَبۡصَٰرِهِنَّ وَيَحۡفَظۡنَ فُرُوجَهُنَّ وَلَا يُبۡدِينَ زِينَتَهُنَّ إِلَّا مَا ظَهَرَ مِنۡهَاۖ وَلۡيَضۡرِبۡنَ بِخُمُرِهِنَّ عَلَىٰ جُيُوبِهِنَّۖ وَلَا يُبۡدِينَ زِينَتَهُنَّ إِلَّا لِبُعُولَتِهِنَّ أَوۡ ءَابَآئِهِنَّ أَوۡ ءَابَآءِ بُعُولَتِهِنَّ أَوۡ أَبۡنَآئِهِنَّ أَوۡ أَبۡنَآءِ بُعُولَتِهِنَّ أَوۡ إِخۡوَٰنِهِنَّ أَوۡ بَنِيٓ إِخۡوَٰنِهِنَّ أَوۡ بَنِيٓ أَخَوَٰتِهِنَّ أَوۡ نِسَآئِهِنَّ أَوۡ مَا مَلَكَتۡ أَيۡمَٰنُهُنَّ أَوِ ٱلتَّٰبِعِينَ غَيۡرِ أُوْلِي ٱلۡإِرۡبَةِ مِنَ ٱلرِّجَالِ أَوِ ٱلطِّفۡلِ ٱلَّذِينَ لَمۡ يَظۡهَرُواْ عَلَىٰ عَوۡرَٰتِ ٱلنِّسَآءِۖ وَلَا يَضۡرِبۡنَ بِأَرۡجُلِهِنَّ لِيُعۡلَمَ مَا يُخۡفِينَ مِن زِينَتِهِنَّۚ وَتُوبُوٓاْ إِلَى ٱللَّهِ جَمِيعًا أَيُّهَ ٱلۡمُؤۡمِنُونَ لَعَلَّكُمۡ تُفۡلِحُونَ你对信女们说，叫她们降低视线，遮蔽下身，莫露出首饰，除非自然露出的，叫她们用面纱遮住胸膛，莫露出首饰，除非对她们的丈夫，或她们的父亲，或她们的丈夫的父亲，或她们的儿子，或她们的丈夫的儿子，或她们的兄弟，或她们的弟兄的儿子，或她们的姐妹的儿子，或她们的女性，或她们的奴婢，或无性欲的男仆，或不懂妇女之事的儿童。叫她们不要用力踏足，使人得知她们所隐藏的首饰。信士们啊！你们应全体向安拉悔罪，以便你们成功。
A second verse
Another verse explains the purpose: that believing women be recognised and protected from harm:
يَٰٓأَيُّهَا ٱلنَّبِيُّ قُل لِّأَزۡوَٰجِكَ وَبَنَاتِكَ وَنِسَآءِ ٱلۡمُؤۡمِنِينَ يُدۡنِينَ عَلَيۡهِنَّ مِن جَلَٰبِيبِهِنَّۚ ذَٰلِكَ أَدۡنَىٰٓ أَن يُعۡرَفۡنَ فَلَا يُؤۡذَيۡنَۗ وَكَانَ ٱللَّهُ غَفُورٗا رَّحِيمٗا先知啊！你应当对你的妻子、你的女儿和信士们的妇女说：她们应当用外衣蒙着自己的身体。这样做最容易使人认识她们，而不受侵犯。安拉是至赦的，是至慈的。
What scholars say
- The majority of jurists across the four schools: covering the hair and body except the face and hands is obligatory.
- They differ on covering the face (niqab): some obligatory, some recommended, many permissible.
- A few contemporary scholars hold the verses establish a principle of modesty without a specific form; this is the minority view.
Choice and dignity
Islam forbids compulsion in religion, and many Muslim women wear the hijab by choice and with pride. Forcing a woman to wear it, or forbidding her from wearing it, are both injustices; each woman answers to her Lord.
لَآ إِكۡرَاهَ فِي ٱلدِّينِۖ قَد تَّبَيَّنَ ٱلرُّشۡدُ مِنَ ٱلۡغَيِّۚ فَمَن يَكۡفُرۡ بِٱلطَّٰغُوتِ وَيُؤۡمِنۢ بِٱللَّهِ فَقَدِ ٱسۡتَمۡسَكَ بِٱلۡعُرۡوَةِ ٱلۡوُثۡقَىٰ لَا ٱنفِصَامَ لَهَاۗ وَٱللَّهُ سَمِيعٌ عَلِيمٌ对于宗教，绝无强迫，因为正邪确已分明了。谁不信恶魔而信安拉，谁确已把握住坚实的、绝不断折的把柄。安拉是全聪的，是全知的。
Hijab, niqab and burqa
- Hijab: a head-and-neck covering with modest clothing.
- Niqab: a face veil leaving the eyes visible.
- Burqa (common in Afghanistan): a full-body covering with a mesh over the eyes.
常见问题
Is it required to wear hijab from the first day of becoming Muslim?
Some new Muslim women adopt it gradually; what matters is sincerity and moving along the path.
Can a Muslim woman work?
Yes; Islam permits women to work, study and own property, and Khadijah, may God be pleased with her, was a merchant.
原文和译文正在接受学者审阅。