Musnad Ahmad 30:2050

Mu'awiyah narrated to us, he said: Za'idah narrated to us, 'Abdullah ibn Dhakwan narrated to us, from 'Abd al-Rahman al-A'raj, from Abu Hurayrah, from the Prophet, peace and blessings of Allah be upon him, who said: "The Hour will not be established until the sun rises from its place of setting. Then all the people will believe, but on that day, 'no soul will benefit from its faith if it had not believed before, or earned good through its faith.' And the Hour will not be established until you fight the Jews, so the Jew will flee behind a stone, and the stone will say: 'O servant of Allah, O Muslim, this is a Jew behind me.' And the Hour will not be established until you fight a people whose sandals are made of hair."