QS. An-Nur [24:31]

waqul lilmu'minaati yaghdhudhna min abshaarihinna wayahfazhna furuujahunna walaa yubdiina ziinatahunna illaa maa zhahara minhaa walyadhribna bikhumurihinna 'alaa juyuubihinna walaa yubdiina ziinatahunna illaa libu'uulatihinna aw aabaa‑ihinna aw aabaa‑i bu'uulatihinna aw abnaa‑ihinna aw abnaa‑i bu'uulatihinna aw ikhwaanihinna aw banii ikhwaanihinna aw banii akhawaatihinna aw nisaa‑ihinna aw maa malakat aymaanuhunna awi alttaabi'iina ghayri ulii al‑irbati mina alrrijaali awi alththifli alladziina lam yazhharuu 'alaa 'awraati alnnisaa‑i walaa yadhribna bi‑arjulihinna liyu'lama maa yukhfiina min ziinatihinna watuubuu ilaa allaahi jamii'an ayyuhaa almu'minuuna la'allakum tuflihuuna

And tell the believing women to reduce [some] of their vision and guard their private parts and not expose their adornment except that which [necessarily] appears thereof and to wrap [a portion of] their headcovers over their chests and not expose their adornment except to their husbands, their fathers, their husbands' fathers, their sons, their husbands' sons, their brothers, their brothers' sons, their sisters' sons, their women, that which their right hands possess, or those male attendants having no physical desire, or children who are not yet aware of the private aspects of women. And let them not stamp their feet to make known what they conceal of their adornment. And turn to Allah in repentance, all of you, O believers, that you might succeed. [31]

— Sahih International