Yahya related to me from Malik from Muhammad ibn Zayd ibn Qunfudh that his mother asked Umm Salama, the wife of the Prophet ﷺ "What clothes can a woman wear in prayer?" She said, "She can pray in a shift that reaches down and covers the top of her feet."

وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ مُحَمَّدِ بْنِ زَيْدِ بْنِ قُنْفُذٍ، عَنْ أُمِّهِ، أَنَّهَا سَأَلَتْ أُمَّ سَلَمَةَ زَوْجَ النَّبِيِّ ﷺ مَاذَا تُصَلِّي فِيهِ الْمَرْأَةُ مِنَ الثِّيَابِ فَقَالَتْ تُصَلِّي فِي الْخِمَارِ وَالدِّرْعِ السَّابِغِ إِذَا غَيَّبَ ظُهُورَ قَدَمَيْهَا .