Musnad Ahmad 27:1906

'Abd al-Razzaq narrated to us, Ma'mar informed us, from al-Zuhri, from Salim, from Ibn 'Umar, that the Messenger of Allah (peace and blessings of Allah be upon him) said: "The Jews will fight you, and you will be given power over them, until the stone says: 'O Muslim, this is a Jew behind me, so kill him.'"