When Surat an-Nur came down, they took the curtains, tore them and made head covers (veils) of them.  

وَقَالَتْ لَمَّا نَزَلَتْ سُورَةُ النُّورِ عَمَدْنَ إِلَى حُجُورٍ أَوْ حُجُوزٍ شَكَّ أَبُو كَامِلٍ فَشَقَقْنَهُنَّ فَاتَّخَذْنَهُ خُمُرًا  

When the verse "That they should cast their outer garments over their persons" was revealed, the women of Ansar came out as if they had crows over their heads by wearing outer garments.  

لَمَّا نَزَلَتْ { يُدْنِينَ عَلَيْهِنَّ مِنْ جَلاَبِيبِهِنَّ } خَرَجَ نِسَاءُ الأَنْصَارِ كَأَنَّ عَلَى رُءُوسِهِنَّ الْغِرْبَانُ مِنَ الأَكْسِيَةِ