Musnad Ahmad 30:943

'Abd al-Razzaq narrated to us, Ma'mar informed us, from Suhayl ibn Abi Salih, from his father, from Abu Hurayrah, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "The Euphrates will uncover a mountain of gold, so the people will fight over it. Ninety—or he said: ninety-nine—out of every hundred will be killed, and every one of them will think that he will be the one to survive."