Musnad Ahmad 30:2700

Hajjaj narrated to us, he said: Layth narrated to us, he said: Sa'id ibn Abi Sa'id narrated to me, from his father, from Abu Hurayrah, that the Messenger of Allah, peace and blessings of Allah be upon him, said: "There is no prophet among the prophets but has been given of the signs what the like of it would cause human beings to believe. And indeed, what I have been given is a revelation that Allah revealed to me, so I hope that I will be the one among them with the most followers on the Day of Resurrection."