24:31] “And say to the believing women that they should lower their gaze and guard their modesty; that they should not display their beauty and ornaments except what (must ordinarily) appear thereof; that they should draw their veils over their bosoms and not display their beauty except to their husbands, their fathers, their husband’s fathers, their sons, their husbands’ sons, their brothers or their brothers’ sons, or their sisters’ sons, or their women, or the slaves whom their right hands possess, or male servants free of physical needs, or small children who have no sense of the shame of sex; and that they should not strike their feet in order to draw attention to their hidden ornaments. And O ye Believers! turn ye all together towards Allah, that ye may attain Bliss”.

In this verse not only those who are MAHRAM for a Muslim women are mentioned but also ALLAH ALMIGHTY’S CLEAR CUT ORDERS about lowering their gaze is given.

MUSLIM WOMEN ORDERED TO TAKE HIJAB:
ALLAH ALMIGHTY ALSO COMMANDS Muslim women to veil themselves before going out or coming in front of any Non-Mahram, so that they not be molested and teased . Its really ALLAH ALMIGHTY’S gift for all the Muslim women but we, unluckily, ponder over it not.

IN SURAH AHZAB ALLAH ALMIGHTY COMMANDS ABOUT THE BELIEVING WOMEN:
33:59] “O Prophet! Tell thy wives and daughters, and the believing women, that they should cast their outer garments over their persons (when abroad): that is most convenient, that they should be known (as such) and not molested. And Allah is Oft-Forgiving, Most Merciful”.