From `Abdul `Aziz ibn `Abdullah ibn Baz to every Muslim who may receive it. May Allah guide us to do good and to avoid Bid`ah (innovation in religion) and evil.
Assalamu `alaykum warahmatullah wabarakatuh (May Allah's Peace, Mercy, and Blessings be upon you!)
And tell the believing women to lower their gaze (from looking at forbidden things), and protect their private parts (from illegal sexual acts) and not to show off their adornment except only that which is apparent...
And when you ask (his wives) for anything you want, ask them from behind a screen: that is purer for your hearts and for their hearts.
Um Salamah (may Allah be pleased with her) said, "When this Ayah (Qur'anic verse) was revealed, the women of the Ansar (Helpers, inhabitants of Madinah who supported the Prophet) came out as if they had crows on their heads out of calmness and they were covered with black clothes."
that when the Prophet (peace be upon him) ordered women to go out to the place of performing Salatul`Eid (the Festival Prayer), one of them said, "O Messenger of Allah, what if she does not have a Jilbab?" He replied, "Then, let her sister lend her one of her Jilbabs." (Related by AlBukhary and Muslim).
When the Prophet (peace be upon him) was coming out of the Masjid, he saw men intermixing freely with women in the street. He (peace be upon him) said, "Draw back, for you must not walk in the middle of the road; keep to the sides of the road." Women were keeping so close to the wall that their garments were rubbing against it.