Narrated Umm Salamah, Ummul Mu'minin:

I was with the Messenger of Allah ﷺ while Maymunah was with him. Then Ibn Umm Maktum came. This happened when we were ordered to observe veil (purdah). The Prophet ﷺ said: Observe veil from him. We asked: Messenger of Allah! is he not blind? He can neither see us nor recognise us. The Prophet ﷺ said: Are both of you blind? Do you not see him? AbuDawud said: This was peculiar to the wives of the Prophet ﷺ. Do you not see that Fatimah daughter of Qays passed her waiting period with Ibn Umm Maktum. The Prophet ﷺ said to Fatimah daughter of Qays: Pass your waiting period with Ibn Umm Maktum, for he is a blind man. You can put off your clothes with him.

حَدَّثَنَا مُحَمَّدُ بْنُ الْعَلاَءِ، حَدَّثَنَا ابْنُ الْمُبَارَكِ، عَنْ يُونُسَ، عَنِ الزُّهْرِيِّ، قَالَ حَدَّثَنِي نَبْهَانُ، مَوْلَى أُمِّ سَلَمَةَ عَنْ أُمِّ سَلَمَةَ، قَالَتْ كُنْتُ عِنْدَ رَسُولِ اللَّهِ ﷺ وَعِنْدَهُ مَيْمُونَةُ فَأَقْبَلَ ابْنُ أُمِّ مَكْتُومٍ وَذَلِكَ بَعْدَ أَنْ أُمِرْنَا بِالْحِجَابِ فَقَالَ النَّبِيُّ ﷺ " احْتَجِبَا مِنْهُ " . فَقُلْنَا يَا رَسُولَ اللَّهِ أَلَيْسَ أَعْمَى لاَ يُبْصِرُنَا وَلاَ يَعْرِفُنَا فَقَالَ النَّبِيُّ ﷺ " أَفَعَمْيَاوَانِ أَنْتُمَا أَلَسْتُمَا تُبْصِرَانِهِ " . قَالَ أَبُو دَاوُدَ هَذَا لأَزْوَاجِ النَّبِيِّ ﷺ خَاصَّةً أَلاَ تَرَى إِلَى اعْتِدَادِ فَاطِمَةَ بِنْتِ قَيْسٍ عِنْدَ ابْنِ أُمِّ مَكْتُومٍ قَدْ قَالَ النَّبِيُّ ﷺ لِفَاطِمَةَ بِنْتِ قَيْسٍ " اعْتَدِّي عِنْدَ ابْنِ أُمِّ مَكْتُومٍ فَإِنَّهُ رَجُلٌ أَعْمَى تَضَعِينَ ثِيَابَكِ عِنْدَهُ " .