Narrated 'Abdullah bin 'Umar: I heard Allah's Apostle saying, "The Jews will fight with you, and you will be given victory over them so that a stone will say, 'O Muslim! There is a Jew behind me; kill him!' "
— Sahih Bukhari, Volume 4, Book 56: Virtues and Merits of the Prophet (pbuh) and his Companions, Hadith #791