What Was Matzah, Really?

The Hidden Agricultural Roots of Passover

Matzah and chametz never made sense to me. Supposedly we eat matzah because our ancestors were in a hurry to get out of Egypt. But there's one glaring problem. In the Torah, God commands them to eat the paschal lamb with matzah BEFORE they ever left Egypt. So obviously, eating it with matzah has nothing to do with the hurrying out of Egypt story.

Another thing I never got is the obsession with getting rid of all chametz. Why exactly? There are all sorts of drashos about chametz symbolizing pride or something, but nothing I heard ever rang true. How was this commandment originally understood?

I recently heard a fantastic podcast episode with Dr. Yael Avrahami that explained it really well.¹ To understand chametz and matzah, we have to go back in time to what the Torah actually meant.

What is Matzah Really?

We picture those thin crackers found year round at the kosher section of ShopRite. But in the Bible, matzah shows up way before Pesach. Lot feeds the angels matzah. The witch of Endor serves King Shaul matzah. Why is matzah everywhere?

Because biblical scholars don't translate matzah as unleavened bread. They translate it as primarily a barley flatbread. In the ancient Near East, fluffy sourdough bread was made from wheat. Barley, however, is a cheap, coarse grain that doesn't rise well because of its low gluten. Instead, it was baked quickly as flatbread. That barley flatbread is matzah. It wasn't only the Israelites who made barley flatbread but it was common all over the Ancient Near East. The ancient Greek also called their barley flatbread Maza, although scholars argue whether that similar spelling is a coincidence or not.

The Torah calls it lechem oni, the bread of affliction or poverty, because barley is cheaper and was used by poor people and given to animals. It was also fast to make, perfect for unexpected guests like angels. It was only much later, in mishnaic times, that the rabbis expanded the rules and said passover matzah can be made from all five grains.

What are Chametz and Se'or?

The Torah discussed getting rid of chametz and se’or. What are those? The root word of chametz literally means ‘to sour.’ In pre modern times, all risen bread was sourdough. They didn't have instant yeast. They had to use a sourdough starter for the bread to rise.

That sourdough starter is Se'or. You use it to create fluffy wheat bread, which is chametz.

You see this clearly in Exodus 12.

Exodus 12:15 commands -

תַּשְׁבִּיתוּ שְּׂאֹר מִבָּתֵּיכֶם כִּי כָּל־אֹכֵל חָמֵץ וְנִכְרְתָה הַנֶּפֶשׁ הַהִוא מִיִּשְׂרָאֵל.

Get rid of se'or from your house because whoever eats chametz will be cut off from Israel.

Repeating in Exodus 12:19

שִׁבְעַת יָמִים שְׂאֹר לֹא יִמָּצֵא בְּבָתֵּיכֶם כִּי כָּל־אֹכֵל מַחְמֶצֶת וְנִכְרְתָה הַנֶּפֶשׁ הַהִוא מֵעֲדַת יִשְׂרָאֵל

Se'or shouldn't be found in your house because whoever eats chametz will be cut off etc.

Se’or is the leavening agent, the sourdough starter, that leads to the chametz. The Torah says to get rid of your Se’or so you don’t end up eating chametz. So for Pesach, the Torah is basically commanding: Eat only plain barley flatbread, and get rid of the sourdough starter you use to make fluffy wheat bread..

​A Tale of Two Spring Festivals

​Pesach, before it became the ultimate holiday of national freedom, actually began as two distinct spring festivals that occurred at the exact same time.

​First was the Festival of the Flock (Pesach), celebrated by shepherds to mark the spring birthing season. They sacrificed a yearling lamb as a protective ritual for the new flock.

​Second was the Festival of Matzot, celebrated by farmers to mark the start of the new barley harvest.

​The barley harvest happens first in the spring, while the wheat is not ready until later. The Torah confirms this agricultural timeline when detailing the plague of hail:

שמות ט:לא - וְהַפִּשְׁתָּ֥ה וְהַשְּׂעֹרָ֖ה נֻכָּ֑תָה כִּ֤י הַשְּׂעֹרָה֙ אָבִ֔יב וְהַפִּשְׁתָּ֖ה גִּבְעֹֽל: לא:לב וְהַחִטָּ֥ה וְהַכֻּסֶּ֖מֶת לֹ֣א נֻכּ֑וּ כִּ֥י אֲפִילֹ֖ת הֵֽנָּה: Exod 9:31 Now the flax and barley were ruined, for the barley was in the ear and the flax was in bud; 9:32 but the wheat and the emmer were not hurt, for they ripen late

​During the Festival of Matzot, the Israelites celebrated the new year's crop by eating the freshly harvested barley, and they got rid of any old wheat or leaven to make bread. Instead, they waited for the new wheat harvest and chag hakatzir (what we now call Shavuos).

Nissan, as the new harvest comes in, is also the beginning of the new year. Getting rid of the old chametz was a ritual to definitively close the calendar on the old agricultural cycle and practically act out a blessing for a bountiful wheat harvest to come.

​To celebrate this new agricultural cycle, the Israelites had to completely separate from the old one. They threw out their old grain and their old sourdough starter.

​This required a massive leap of faith. In the ancient world, fermentation was not viewed as basic biology. It was seen as a literal miracle granted by the gods. Creating a brand new sourdough starter from scratch with flour and water takes roughly a week, which perfectly aligns with the seven days of the festival. By destroying their starter, the Israelites voluntarily gave up their food security, trusting God to recreate the miracle of fermentation for them in the new year.

​Pesach Today

​As Judaism shifted away from its agricultural roots and more toward strict rabbinic law, the original seasonal symbolism faded. The primary goal simply became avoiding chametz at all costs.

​This evolution leads to the ultimate irony of modern Shmura Matzah. Because later rabbis became terrified of accidental fermentation, Shmura Matzah is made using carefully guarded wheat harvested from the previous year. Using old grain is the exact opposite of the holiday's original purpose, which was entirely about discarding the old year's crop to celebrate the new.

​We may not be ancient farmers relying on the barley harvest anymore, and the historical meaning behind these rituals may have shifted over millennia. But as we sit down to celebrate Pesach this year, however we may practice, let's consider the original agricultural roots. Let's clear out our old grain and make way for the new, while trusting that the universe/Hashem/the uncaring mechanisms of Nature will give us a great new crop . May this Pesach be a renewal for all of us.

1. She also has an article on TheTorah.com in English here