وَعَن أم سَلمَة قَالَتْ لِرَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ حِينَ ذَكَرَ الْإِزَارَ: فَالْمَرْأَةُ يَا رَسُولَ اللَّهِ؟ قَالَ: «تُرْخِي شِبْرًا» فَقَالَتْ: إِذًا تَنْكَشِفُ عَنْهَا قَالَ: «فَذِرَاعًا لَا تَزِيدُ عَلَيْهِ» . رَوَاهُ مَالِكٌ وَأَبُو دَاوُد وَالنَّسَائِيّ وَابْن مَاجَه وَفِي رِوَايَةِ التِّرْمِذِيِّ وَالنَّسَائِيِّ عَنِ ابْنِ عُمَرَ فَقَالَتْ: إِذًا تَنْكَشِفُ أَقْدَامُهُنَّ قَالَ: «فَيُرْخِينَ ذِرَاعًا لَا يزدن عَلَيْهِ»

When God’s messenger mentioned the lower garment Umm Salama asked what a woman should do and he said she should let it down a span. She replied that in that case she would not be completely covered, and he said she might let it down a cubit, but no more. Malik, Abu Dawud, Nasa’i and Ibn Majah transmitted it. In the version of Tirmidhi and Nasa’i on the authority of Ibn ‘Umar she said their feet would then be uncovered, and he replied that they should let it down a cubit, but no more.