Sayyiduna Abu Hurairah (may Allah be pleased with him) narrates that the Prophet Muhammad (peace and blessings be upon him) said: "A time will soon come upon you when the river Euphrates will uncover a mountain of gold, over which people will fight. Out of every hundred, ninety people will be killed." (The narrator says: O my son! If you reach that time, then do not be among those who fight for it.)