Lehava (להב״ה "Flame," Hebrew: למניעת התבוללות בארץ הקודש LiMniat Hitbolelut B'eretz HaKodesh; Prevention of Assimilation in the Holy Land) is an Israeli far-right and Jewish supremacist organization based in Israel that strictly opposes Jewish assimilation, objecting to most personal relationships between Jews and non-Jews. It is opposed to the Christian presence in Israel. It has an anti-intermarriage focus, denouncing marriages between Jews and non-Jews forbidden by Orthodox Jewish law. The group has over 10,000 members. In 2024, the United States placed Lehava and its leader, Bentzi Gopstein, on a sanctions list for their role in fomenting Israeli settler violence against Palestinians in the Israeli-occupied West Bank, labeling Lehava "the largest violent extremist organization in Israel."