Musnad Abu Ya'la al-Mawsili 160:189

Ahmad ibn ‘Isa narrated to us, Ibn Wahb narrated to us, from Abu Sakhr, that Sa‘id al-Maqburi informed him that he heard Abu Hurayrah saying: I heard the Messenger of Allah (may Allah bless him and grant him peace) saying: "By the One in Whose hand is the soul of Abu al-Qasim, ‘Isa ibn Maryam will surely descend as a just leader and a fair judge. He will surely break the cross, kill the swine, reconcile the differences, and remove hatred. Wealth will be offered to him, but he will not accept it. Then, if he were to stand at my grave and say, 'O Muhammad,' I would surely answer him."