"Khaybar, Khaybar, ya yahud! Jaish Muhammad soufa yaʿoud!" (Arabic: خيبر خيبر يا يهود جيش محمد سوف يعود; lit. 'Khaybar, Khaybar, Oh Jews! The army of Muhammad will return!') is an Arabic-language rallying slogan referencing the Battle of Khaybar of 628 CE, which began after Muhammad marched with a large Muslim army and besieged Khaybar, an oasis in present-day Saudi Arabia that was home to a notable Jewish community.
The slogan is chanted primarily at public anti-Israel demonstrations, though it has been invoked during Islamist terrorist attacks as well.
The chant has been categorized as antisemitic by the American news broadcaster PBS[1] and the Israeli newspaper The Times of Israel,[2] and by the British advocacy group Muslims Against Antisemitism[3] and the American advocacy group Anti-Defamation League.[4]