(31. And tell the believing women to lower their gaze, and protect their private parts and not to show off their adornment except that which is apparent, and to draw their veils all over their Juyub and not to reveal their adornment except to their husbands, or their fathers, or their husband's fathers, or their sons, or their husband's sons, or their brothers or their brother's sons, or their sister's sons, or their women, or their right hand possessions, or the Tabi`in among men who do not have desire, or children who are not aware of the nakedness of women. And let them not stamp their feet so as to reveal what they hide of their adornment. And all of you beg Allah to forgive you all, O believers, that you may be successful.)
I have found this explanation very rare, you all can read these lines, here is the link
http://www.qtafsir.com/index.php?option=com_content&task=view&id=2431&Itemid=79
