[7:26] O children of Adam! We have indeed sent down to you clothing to cover your shame, and (clothing) for beauty and clothing that guards (against evil), that is the best. This is of the communications of Allah that they may be mindful.
[24:31] And say to the believing women that they cast down their looks and guard their private parts and do not display their ornaments except what appears thereof, and let them wear their head-coverings over their bosoms, and not display their ornaments except to their husbands or their fathers, or the fathers of their husbands, or their sons, or the sons of their husbands, or their brothers, or their brothers' sons, or their sisters' sons, or their women, or those whom their right hands possess, or the male servants not having need (of women), or the children who have not attained knowledge of what is hidden of women; and let them not strike their feet so that what they hide of their ornaments may be known; and turn to Allah all of you, O believers! So that you may be successful.
[24:60] And (as for) women advanced in years who do not hope for a marriage, it is no sin for them if they put off their clothes without dis- playing their ornaments; and if they restrain themselves it is better for them; and Allah is Hearing, Knowing.
[33:59] O Prophet! Say to your wives and your daughters and the wo- men of the believers that they let down upon them their over garments; this will be more proper, that they may be known, and thus they will not be given trouble; and Allah is Forgiving, Merciful.