Umm 'Atiyya reported: The Messenger of Allah (ﷺ) commanded us to bring out on'Id-ul-Fitr and 'Id-ul-Adha young women, menstruating women and screened away ladies, menstruating women kept back from prayer, but participated in goodness and supplication of the Muslims. I said: Messenger of Allah, one of us does not have an outer garment (to cover her face and body). He said: Let her sister cover her with her outer garment.
Source: sunnah.com
Other translations
Arabic
وَحَدَّثَنَا عَمْرٌو النَّاقِدُ، حَدَّثَنَا عِيسَى بْنُ يُونُسَ، حَدَّثَنَا هِشَامٌ، عَنْ حَفْصَةَ بِنْتِ، سِيرِينَ عَنْ أُمِّ عَطِيَّةَ، قَالَتْ أَمَرَنَا رَسُولُ اللَّهِ صلى الله عليه وسلم أَنْ نُخْرِجَهُنَّ فِي الْفِطْرِ وَالأَضْحَى الْعَوَاتِقَ وَالْحُيَّضَ وَذَوَاتِ الْخُدُورِ فَأَمَّا الْحُيَّضُ فَيَعْتَزِلْنَ الصَّلاَةَ وَيَشْهَدْنَ الْخَيْرَ وَدَعْوَةَ الْمُسْلِمِينَ . قُلْتُ يَا رَسُولَ اللَّهِ إِحْدَانَا لاَ يَكُونُ لَهَا جِلْبَابٌ قَالَ " لِتُلْبِسْهَا أُخْتُهَا مِنْ جِلْبَابِهَا " .
sunnah.com