Musannaf Ibn Abi Shayba 37:308

Ubayd Allah ibn Musa narrated to us, from Hasan ibn Salih, from Mu'awiyah ibn Ishaq, who said: A man from al-Ta'if narrated to me, from Abdullah ibn Amr, who said: The Hour will not be established until they copulate in the roads like the copulation of donkeys. Then Iblis will come to them and turn them toward the worship of idols.