Khaybar Khaybar ya yahud, jaish Muhammad soufa ya'oud (Arabic: خيبر خيبر يا يهود جيش محمد سوف يعود; "Khaybar Khaybar oh Jews, the army of Muhammad will return") is an Islamic extremist chant in Arabic that calls for violence against Jews. The chant refers to the seventh-century Battle of Khaybar in which Muslims led by Muhammad slaughtered the Jews of the Khaybar oasis, in present-day Saudi Arabia.^[1][2]

The slogan was coined in the late 1980s during the First Intifada by Ahmed Yassin, founder of the militant Palestinian Islamist organization Hamas.^[3][4][5][6]

The slogan has since been embraced more widely by Islamists,^[7] Islamic extremists and anti-Israel militants.^[8][9] It has been chanted at Islamic extremist and pro-Palestinian demonstrations, including in Jerusalem,^[10][11] Sweden,^[12] England,^[13][14][15] Austria,^[16] Belgium,^[17] the Netherlands,^[18][19][20] and Australia.^[21] The chant is employed more frequently during periods of violence between Israel and the Palestinians, like during the 2021 Israel–Palestine crisis and the 2023 Israel–Hamas war.^[22][23]

News outlets PBS^[24] and Times of Israel^[25], and advocacy groups Muslims Against Antisemitism^[26] and the Anti-Defamation League consider the chant to be antisemitic.^[2]

In Europe, those chanting it have faced criminal charges, including incitement to hatred.^[27][28]

Shaima Dallali stepped down as president of the National Union of Students in 2022 after controversy surrounding allegations of antisemitism, including her previous use of the phrase "Khaybar Khaybar O Jews … Muhammad’s army will return Gaza."^[29]

Indonesian terrorist Amrozi, involved in the 2002 Bali bombings, shouted the slogan before being sentenced to death in 2003 in a Bali courtroom.^[30]