Chametz (חמץ Hebrew) (also Chometz or Chumetz) refers to brea, grains and leavened products that are not consumed on the Jewish holiday of Passover, as well as all food items that are not specifically marked "kosher for Passover." According to Jewish law, Jews may not own, eat or benefit from chametz during Passover. This law appears several times in the Bible. The punishment for eating chametz on Passover is karet ("spiritual excision").