Musnad Ahmad 1153:256

Yahya narrated to us, from Hatim—meaning Ibn Abi Saghir—who said: Ibn Abi Mulaykah narrated to us, that al-Qasim ibn Muhammad informed him, from Aisha, from the Prophet, may God bless him and grant him peace, who said: "You will be gathered on the Day of Resurrection barefoot, naked, and uncircumcised." Aisha said: "O Messenger of God, will men and women look at one another?" He said: "O Aisha, the matter is too severe for them to be concerned with that."