And tell the believing women to restrain their looks, and to guard their privates, and not display their beauty except what is apparent thereof, and to draw their coverings over their breasts, and not expose their beauty except to their husbands, their fathers, their husbands' fathers, their sons, their husbands' sons, their brothers, their brothers' sons, their sisters' sons, their women, what their right hands possess, their male attendants who have no sexual desires, or children who are not yet aware of the nakedness of women. And they should not strike their feet to draw attention to their hidden beauty. And repent to God, all of you believers, so that you may succeed.

The Holy Quran · An-Noor (The Light) · 24:31