Sahih Muslim , Book 40, Hadith 6844 (USC-MSA) ⓘ
'A'isha reported that she heard Allah's Messenger 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 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 " .
also referenced under: Book 53, Hadith 67 (In-Book) & Hadith 2859 (Reference)