
Chametz, also Chometz, Ḥametz, Ḥameṣ and other spellings transliterated from חָמֵץ / חמץ (IPA), are leavened foods that are forbidden on the Jewish holiday of Passover. According to Jewish law, Jews may not own, eat or benefit from chametz during Passover. This law appears several times in the Torah; the punishment for eating chametz...
Found on
http://en.wikipedia.org/wiki/Chametz

The five grains of wheat, barley, spelt, rye, and oats or products produced from them, which Jews are prohibited to eat or own on Passover.
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https://www.encyclo.co.uk/local/23059
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