Which five grains can produce chametz?

The five grains that can produce chametz (and from which matzah can also be made) are: wheat (chitah), barley (se'orah), spelt (kusmin or dinkel), rye (shibolet shu'al), and oats (shibbolet). These are the five grains specifically associated with the agricultural cycles of the Land of Israel and identified by the rabbis as the only grains that can leaven. Other grains (rice, corn, millet) cannot technically become chametz, though they may be treated as kitniyot by Ashkenazic custom.

What is the practical difference between this commandment and #471 (Do Not Eat Leaven on Passover)?

Commandment #471 (Ex 13:3) establishes the general principle that chametz may not be eaten on Passover. Commandment #477 adds the "kol" (all forms) dimension: no chametz in any of its forms, regardless of how it was made, how much chametz it contains, or what other ingredients it includes. Together they create two distinct violations for eating chametz on Passover: one for the act of eating and one for the comprehensive scope of what counts as chametz.

Does this prohibition apply to chametz that cannot be tasted in the final product?

Yes. The unique stringency of Passover chametz law is that even a trace amount that cannot be tasted still renders the food forbidden. Unlike most prohibited substances (where bitul b'shishim applies once the ratio is less than 1:60), chametz on Passover is never nullified. If even a small amount of wheat flour, beer, or other chametz is present in a food, the entire food is forbidden. This is the practical implication of the "kol chametz" prohibition.

Commandment #477 · Negative #321

Do Not Eat Chametz in Any Form on Passover

לֹא תֹאכַל עֲלֵיהֶם כָּל חָמֵץ

Exodus 13:3 · Sabbath & Holy Days

וַיֹּאמֶר מֹשֶׁה אֶל הָעָם זָכוֹר אֶת הַיּוֹם הַזֶּה

“Remember this day in which you came out from Egypt, out of the house of slavery, for by a strong hand the LORD brought you out from this place.”

Exodus 13:3

The Five Grains — Which Foods Can Become Chametz

The prohibition on chametz covers all leavened products derived from the five grains: wheat, barley, spelt, rye, and oats. These are the grains that can ferment and leaven when mixed with water — and they are also the grains from which matzah is made. The entire chametz/matzah system turns on the same five grains: prepared quickly, they are matzah; allowed to ferment, they become chametz. No other grain — rice, corn, millet, legumes — can technically become chametz, because those grains do not leaven in the same way.

The Torah’s phrase “kol chametz” (every form of chametz) in Exodus 13:3 reflects this comprehensive scope: not just bread, but any product derived from these five grains in which fermentation has occurred. Beer brewed from barley is chametz. Whiskey distilled from grain is chametz. Pasta made from wheat is chametz if it leavened. Pretzels, crackers, cookies, cereals — all chametz. The prohibition is as broad as the category of fermented grain products from the five grains is wide.

“Kol Chametz” — The Comprehensive Formulation

The Torah uses the word “kol” (all, every) in the chametz prohibition in multiple passages, always with the same intent: no form of chametz escapes. Exodus 12:20: “You shall eat nothing leavened (kol machmetset).” The rabbis read this as covering the full spectrum of chametz products — not just obvious chametz (bread) but chametz in any of its forms, in any amount. The prohibition is not against “eating too much chametz” or “eating obvious chametz” — it is against eating any chametz in any form.

This comprehensive scope means that every processed food consumed on Passover requires verification. In a modern food supply where wheat starch, malt extract, barley-based glucose syrup, and similar ingredients appear in products that bear no obvious resemblance to bread, the “kol chametz” prohibition requires systematic checking: every ingredient, in every product, traces back to one of the five grains? If so, is there any fermentation in the production process? The prohibition’s comprehensive scope is the foundation of the Passover certification industry.

Multiple Prohibitions — Why the Torah States the Chametz Ban Repeatedly

The Torah prohibits chametz on Passover in at least five distinct formulations across Exodus and Deuteronomy. The rabbis count each formulation as a separate negative commandment. Why the repetition? Each statement adds a distinct dimension: one establishes the general prohibition; one specifies the seven-day duration; one addresses possession; one covers mixtures; one covers all forms. Together the five (or more) chametz prohibitions create an interlocking system in which chametz is forbidden from multiple halachic angles simultaneously.

A person who eats chametz on Passover may violate not one but several of these prohibitions in a single act. This multi-violation structure reflects the severity with which the Torah treats the chametz prohibition. Of all the Torah’s dietary laws, only chametz carries the karet (excision) penalty. Only chametz must not merely be avoided but actively removed from the domain. Only chametz cannot be nullified through ratio. The repeated prohibitions reinforce: this is not an ordinary dietary restriction — it is the dietary law of a people defined by the Exodus, and its comprehensive scope matches the comprehensiveness of the event it commemorates.

For reflection and group study

The prohibition on chametz is stated at least five times in the Torah, each formulation adding a different dimension. What does this repetition reveal about how the Torah uses legal redundancy to create depth rather than mere emphasis? Is this a legal technique or a theological statement?

See Exodus 13:3

Exodus 13:3 grounds the chametz prohibition in memory: “Remember this day in which you came out from Egypt.” Yet the prohibition is also comprehensive and technical — covering five grains, all products, any amount. How does the combination of profound theological grounding (memory of the Exodus) and comprehensive technical specificity (five grains, trace amounts, all forms) reflect the Torah’s approach to sacred obligation?

See Exodus 13:3

Modern food production makes chametz extraordinarily difficult to detect and eliminate — it appears in hidden forms in thousands of products. What does the challenge of keeping Passover in a modern food system reveal about the tension between the eternal demands of Torah commandments and the changing contexts in which they must be observed?

See Exodus 13:3

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