Musannaf Ibn Abi Shayba 18:1227

Abu Bakr narrated to us, he said: Waki’ narrated to us, he said: Fudayl ibn Marzuq narrated to us, from ‘Atiyyah ibn Sa’d al-‘Awfi, from ‘Abd al-Rahman ibn Jundab, from ‘Ali, that he was asked about his slain ones and the slain ones of Mu’awiyah. He said: "I and Mu’awiyah will come and dispute before the Possessor of the Throne; so whichever of us succeeds, his companions will succeed."