Re: Covering of women hair
Some people have already given the relevant Quranic verse. it is worth noting that while the English translation given states “and to draw their veils over their bosoms”, the arabic word translated as “Veil” is “Khimar”, which specifically refers to a head covering worn by women.
The explicit instruction about covering hair that clarifies this further comes from neither the Quran nor interpretation of scholars - instead it comes from Hadith where the Prophet (pbuh) is directly quoted to have instructed this.
“O Asma’! Once a girl reaches puberty, nothing of her body may be seen (by non-mahrams) except this and these, (he pointed to his face and hands while saying so).” (Abu Dawud)