The Prophet ﷺ said: Do not unveil your thigh, and do not look at the thigh of the living and the dead.  

أَنَّ النَّبِيَّ ﷺ قَالَ لاَ تُبْرِزْ فَخِذَكَ وَلاَ تَنْظُرَنَّ إِلَى فَخِذِ حَىٍّ وَلاَ مَيِّتٍ  

By Allah, we did not know whether we should take off the clothes of the Messenger of Allah ﷺ as we took off the clothes of our dead, or wash him while his clothes were on him. When they (the people) differed among themselves, Allah cast slumber over them until every one of them had put his chin on his chest. Then a speaker spoke from a side of the house, and they did not know who he was: Wash the Prophet ﷺ while his clothes are on him. So they stood round the Prophet ﷺ and washed him while he had his shirt on him. They poured water on his shirt, and rubbed him with his shirt and not with their hands. Aisha used to say: If I had known beforehand about my affair what I found out later, none would have washed him except his wives.  

سَمِعْتُ عَائِشَةَ تَقُولُ لَمَّا أَرَادُوا غَسْلَ النَّبِيِّ ﷺ قَالُوا وَاللَّهِ مَا نَدْرِي أَنُجَرِّدُ رَسُولَ اللَّهِ ﷺ مِنْ ثِيَابِهِ كَمَا نُجَرِّدُ مَوْتَانَا أَمْ نُغَسِّلُهُ وَعَلَيْهِ ثِيَابُهُ فَلَمَّا اخْتَلَفُوا أَلْقَى اللَّهُ عَلَيْهِمُ النَّوْمَ حَتَّى مَا مِنْهُمْ رَجُلٌ إِلاَّ وَذَقْنُهُ فِي صَدْرِهِ ثُمَّ كَلَّمَهُمْ مُكَلِّمٌ مِنْ نَاحِيَةِ الْبَيْتِ لاَ يَدْرُونَ مَنْ هُوَ أَنِ اغْسِلُوا النَّبِيَّ ﷺ وَعَلَيْهِ ثِيَابُهُ فَقَامُوا إِلَى رَسُولِ اللَّهِ ﷺ فَغَسَلُوهُ وَعَلَيْهِ قَمِيصُهُ يَصُبُّونَ الْمَاءَ فَوْقَ الْقَمِيصِ وَيُدَلِّكُونَهُ بِالْقَمِيصِ دُونَ أَيْدِيهِمْ وَكَانَتْ عَائِشَةُ تَقُولُ لَوِ اسْتَقْبَلْتُ مِنْ أَمْرِي مَا اسْتَدْبَرْتُ مَا غَسَّلَهُ إِلاَّ نِسَاؤُهُ