Modesty

And tell believing women to lower their gaze, guard their modesty, and not display their beauty except what is naturally visible. Let them draw their veils over their chests and not reveal their adornment except to their husbands, fathers, sons, brothers, nephews, womenfolk, or those in their care. Let them not stamp their feet to reveal what they hide. Turn to Allah in repentance, all of you believers, so that you may succeed.

24:31And tell the believing women to lower their gaze and be modest, and to display of their adornment only that which is apparent, and to draw their veils over their bosoms, and not to reveal their adornment save to their own husbands or fathers or husbands' fathers, or their sons or their husbands' sons, or their brothers or their brothers' sons or sisters' sons, or their women, or their slaves, or male attendants who lack vigour, or children who know naught of women's nakedness. And let them not stamp their feet so as to reveal what they hide of their adornment. And turn unto Allah together, O believers, in order that ye may succeed.