Chametz

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Chametz (also chometz, ḥametz, ḥameṣ, ḥameç and other spellings transliterated from Hebrew: חָמֵץ / חמץ; IPA: [χaˈmets]) are foods with leavening agents that are forbidden to Jews on the holiday of Passover.

Chametz is a product that is both made from one of the five species of grain and has been combined with water and left to stand raw for longer than eighteen minutes (according to most opinions) and becomes leavened. This law appears several times in the Torah; according to halakha (Jewish law), Jews may not own, eat or benefit from chametz during Passover. The penalty for eating chametz on Passover is the divine punishment of kareth (cutting off).