Sahih Muslim Book 40, Hadith Number 6844.

Chapter : Pertaining to the destruction of the world and assembling on the day of Resurrection.

‘Aisha reported that she heard Allah’s Messenger (may peace be upon him) 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 (may peace be upon him) said: ‘Aisha, the matter would be too serious for them to look to one another.