Khaybar Khaybar ya yahud
"Khaybar Khaybar ya yahud" is the first verse of an antisemitic chant which references a battle fought in 628 CE in the Khaybar Oasis, in the Hejaz province of modern-day Saudi Arabia. During this battle, the army of the Prophet Muhammad is believed to have accused the Jews living in Khaybar of conspiring with other Jewish tribes and using the accusation as an excuse to massacre the Jewish population there. The full verse is: "Khaybar Khaybar ya yahud, jaish Muhammad soufa ya'oud." It translates to "Khaybar Khaybar oh Jews, the army of Muhammad will return."