كتاب الجنة وصفة نعيمها وأهلها
53  
The Book of Paradise, its Description, its Bounties and its Inhabitants
(14)
Chapter: The Passing Away Of This World, And The Gathering On The Day Of Resurrection
(14)
باب فَنَاءِ الدُّنْيَا وَبَيَانِ الْحَشْرِ يَوْمَ الْقِيَامَةِ
Sahih Muslim 2859 a

'A'isha reported that she heard Allah's Messenger (ﷺ) as saying:

The people would be assembled on the Day of Resurrection barefooted, naked and uncircumcised. I said: Allah's Messenger, will the male and the female be together on the Day and would they be looking at one another? Upon this Allah's Messenger (ﷺ) said: 'A'isha, the matter would be too serious for them to look to one another.
وَحَدَّثَنِي زُهَيْرُ بْنُ حَرْبٍ، حَدَّثَنَا يَحْيَى بْنُ سَعِيدٍ، عَنْ حَاتِمِ بْنِ أَبِي صَغِيرَةَ، حَدَّثَنِي ابْنُ أَبِي مُلَيْكَةَ، عَنِ الْقَاسِمِ بْنِ مُحَمَّدٍ، عَنْ عَائِشَةَ، قَالَتْ سَمِعْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم يَقُولُ ‏"‏ يُحْشَرُ النَّاسُ يَوْمَ الْقِيَامَةِ حُفَاةً عُرَاةً غُرْلاً ‏"‏ ‏.‏ قُلْتُ يَا رَسُولَ اللَّهِ النِّسَاءُ وَالرِّجَالُ جَمِيعًا يَنْظُرُ بَعْضُهُمْ إِلَى بَعْضٍ قَالَ صلى الله عليه وسلم ‏"‏ يَا عَائِشَةُ الأَمْرُ أَشَدُّ مِنْ أَنْ يَنْظُرَ بَعْضُهُمْ إِلَى بَعْضٍ ‏"‏ ‏.‏
Reference : Sahih Muslim 2859a
In-book reference : Book 53, Hadith 67
USC-MSA web (English) reference : Book 40, Hadith 6844
  (deprecated numbering scheme)