Musnad Abu Ya'la al-Mawsili 155:245

On the authority of Abu Hurairah, that the Messenger of Allah (peace and blessings of Allah be upon him) said: "The Hour will not be established until the sun rises from its place of setting. So when it rises and the people see it, everyone upon it will have believed, at a time when it will not benefit a soul to believe if it had not believed before, or earned good through its belief."