One of the central mitzvos of the Seder night is telling the Haggadah, but another primary mitzvah is the eating of Matzah. We recite a special blessing: Baruch Atah Adonai, Eloheinu Melech ha’olam, asher kid’shanu b’mitzvotav v’tzivanu al achilat matzah—for eating the matzah. This is the main mitzvah nowadays, because the mitzvah of Maror today is only d’Rabbanan. From the Torah’s perspective, Maror is meant to be eaten together with the Korban Pesach. Since we no longer have the Korban Pesach, the Torah obligation of Maror no longer applies. The sages instituted that we still eat Maror as a remembrance of how it was eaten in the time of the Beis HaMikdash.
Matzah, however, remains an independent mitzvah min ha-Torah. It does not depend on the Korban Pesach or on Maror. This raises an important question. On every Shabbos and Yom Tov, there is a mitzvah to eat bread, Lechem Mishneh. So what is the novelty—what is the chiddush—of the Torah commanding us to eat Matzah on the night of Pesach? If one cannot eat chametz, then naturally one will eat matzah. What new obligation is being introduced?
The Ran explains that the novelty is the requirement of Matzah Oni, the “poor man’s bread.” One cannot fulfill the mitzvah with Matzah Ashirah, matzah made with fruit juice or enriched dough. On Pesach night, one must eat simple matzah made from flour and water alone. On other Yom Tov nights, however, one could technically fulfill the obligation with such enriched matzah. That is the distinction the Ran emphasizes.
However, this explanation assumes that the obligation to eat bread on every Yom Tov night is itself min ha-Torah. There are many authorities who disagree and hold that the obligation to eat bread on Yom Tov is only d’Rabbanan. According to that view, the uniqueness of Pesach night is even more straightforward, since it is the only time there is a Torah obligation to eat bread at night.
This debate depends on the underlying reason for eating bread on Yom Tov. There are three concepts: Kavod (honor), Oneg (pleasure), and Simcha (joy). Simcha is clearly a Torah obligation, as the verse states, V’samachta b’chagecha. The Gemara teaches that ein simcha ela b’basar v’yayin—true joy is expressed through meat and wine.
The Alter Rebbe rules that the obligation to eat bread on Yom Tov is based on Oneg, the idea of deriving pleasure from the meal. Since Oneg is derived from verses in the Prophets, it is considered mi-divrei sofrim and not a direct Torah obligation. Therefore, eating bread on Yom Tov night is d’Rabbanan.
However, other authorities, such as the Rosh as explained by the Madanei Yom Tov, understand that the obligation of bread is tied to Simcha. According to this approach, basar v’yayin implies a full meal, which naturally includes bread. If so, one might argue that the obligation is indeed min ha-Torah.
The Rebbe, citing the Shaagas Aryeh, clarifies that even according to this view, the obligation of Simcha applies only during the daytime of Yom Tov, not at night. Therefore, even if bread is part of Simcha, the Torah obligation would not apply at night. As a result, the obligation to eat bread on Yom Tov night remains d’Rabbanan.
This leads to an important conclusion. The only nights on which there is a Torah obligation to eat bread are the first night of Pesach—ba’erev tochlu matzos—and, through a gezeirah shavah, the first night of Succos. On all other Yom Tov nights, the obligation is rabbinic.
Accordingly, the mitzvah of eating Matzah on Pesach night stands apart. It is not merely a substitution for bread due to the prohibition of chametz. It is a distinct and independent Torah commandment, with its own requirements and significance.
While the Ran emphasizes the distinction through the requirement of Matzah Oni, the broader analysis shows that the very obligation itself is unique. On Pesach night, the act of eating matzah is not simply part of the meal—it is the fulfillment of a direct Torah mitzvah, unlike any other Yom Tov night.