Mishneh Torah, Sabbath 27

Sugya Map

The definition, scope, and scriptural provenance of techumin (Sabbath boundaries) represent one of the classic battlegrounds of Talmudic and post-Talmudic lomdus. The core of the debate lies in whether the spatial boundaries of Shabbat are rooted in biblical law (d'oraita) or are entirely a rabbinic protective fence (d'rabbanan).

• The Core Issue: Is there a biblical prohibition against traveling beyond a certain distance on Shabbat, and if so, what is that distance?
• The Primary Sources:
  • Exodus 16:29: "Remain every man in his place, let no man go out of his place on the seventh day."
  • Eruvin 17b: The tannaitic dispute between Rabbi Akiva (who derives a 2,000-cubit biblical limit from the Levite city boundaries) and the Sages.
  • Eruvin 25b: The measurement of the Wilderness encampment of Israel as twelve mil (three parsaot).
  • Yoma 66b–Yoma 67a: The journey of the Se'ir HaMeshtaleach (Scapegoat) on Yom Kippur and its implications for techumin.
  • Keritut 14a: Parallel discussion on Yom Kippur, Shabbat, and the concept of hotza'ah (carrying).
• The Nafka Minas (Practical/Conceptual Consequences):
  1. Safek Techumin: If a traveler is in doubt whether they have crossed their Shabbat boundary, is this resolved leniently (safek d'rabbanan l'kula) or stringently (safek d'oraita l'chumra)?
  2. Yom Tov boundaries: Does the prohibition of techumin apply to Jewish holidays? If the prohibition is a function of "Shabbat rest" (shevitah), it may not extend to Yom Tov; if it is a function of the spatial sanctity of the day, it might.
  3. Eruvei Techumin: How can a rabbinic mechanism—placing food (eruv b'pat) before Shabbat—alter a person's biblical base? If the boundary is biblical, how does a piece of bread redefine a biblical prohibition?
  4. Chatzi Shiur: If the biblical boundary is twelve mil, is walking eleven mil prohibited under the principle of chatzi shiur assur min ha-torah (a partial measure of a prohibited act is biblically forbidden)?
  5. Kavod HaBriyot: Does the imperative of human dignity (e.g., leaving the boundary to relieve oneself) override a techum violation?

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Text Snapshot

In his magnum opus, the Mishneh Torah, the Rambam codifies his unique and highly controversial position regarding the dual-tiered nature of techumin:

היוצא חוץ לתחום המדינה בשבת לוקה, שנאמר: "אל יצא איש ממקומו ביום השביעי" [שמות טז, כט]. אין "מקום" זה אלא תחומי המדינה. ולא פירשה תורה שיעור תחום זה, אלא שחכמים העתיקו ששיעור זה הוא שנים עשר מיל כמחנה ישראל. וכך משה רבינו אומר להם: אל יצא איש חוץ למחנה. ומדברי סופרים שלא יהלך אדם אלא אלפים אמה חוץ לעיר. [^1]

Textual and Linguistic Analysis

1. העתיקו (He'etiku): The Rambam does not write that Chazal legislated (tiknu) or decreed (gazu) the twelve-mil limit. Rather, they he'etiku—meaning they transmitted via authentic oral tradition (kabbalah) a quantitative definition of the biblical term "place" (makom). In the Rambam's lexicon, ha'atakah refers to the oral transmission of details not explicitly written in the written Torah but possessing biblical authority.[^2]
2. ומדברי סופרים (U-midivrei soferim): This phrase is sharply contrasted with he'etiku. The 2,000-cubit limit is purely midivrei soferim—a rabbinic decree designed to serve as a protective buffer around the biblical twelve-mil boundary.
3. לוקה (Lokeh): The Rambam rules that one who crosses the twelve-mil boundary receives biblical lashes (malkut). This confirms that he views the twelve-mil limit as a full negative commandment (lo ta'aseh), specifically Negative Commandment 321 in his Sefer HaMitzvot.[^3]

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Readings

To understand how the Rambam's position is sustained, challenged, and conceptually mapped, we must analyze the insights of the major commentators who wrestled with this text.

1. Ohr Sameach: The Relational Vector of Space

The Ohr Sameach addresses a profound conceptual challenge raised by the Ramban.[^4] If we accept the view of Rabbi Akiva in Eruvin 17b that the 2,000-cubit limit is d'oraita, or if we accept the Rambam's view that the twelve-mil limit is d'oraita, how can a rabbinic institution like eruvei techumin (using food to establish a new base) permit someone to walk past their original biblical limit? If the Torah set a hard boundary, how can a piece of bread override a biblical prohibition?

The Ohr Sameach offers a brilliant conceptual restructuring of the mitzvah of techumin:

לכן נראה לי כך, כמו שגדרה התורה את עם ישראל בשבת בשביתת גופו ממלאכה כן גדרתו ג"כ בהליכתו... וממקום שביתתו ודירתו יש לו אלפים לכל רוח להלוך בהם... כי יצא מהם הוי כיוצא ממקומו ולוקה. וכיון דגמירי שיעור מקום... אין זה מושכל לומר שיהלך מצד אחד שני אלפים ומשאר הרוחות לא יזוז אמה, לכן בטח המקום הוא אחרי התיחסו אל האדם היושב בו כיחס הקוים אל המרכז. [^5]

The Ohr Sameach's chiddush is that the Torah did not define techumin as absolute geographical coordinates (a physical prison). Rather, the Torah prohibited leaving one's relational space (makom). A person's makom is defined as a symmetrical vector radiating outward from their center (merkaz).

The center is established by where a person's mind and body are anchored at the onset of Shabbat (bein ha-shemashot). By placing food at a specific location before Shabbat, a person legally and mentally establishes their dwelling (shevitah) at that new point. Consequently, the biblical vector of 2,000 cubits (or twelve mil) now radiates from this new center.

However, because the Torah demands a symmetrical space, if the person were allowed to walk 2,000 cubits westward from their new center and still retain access to their old home to the east, their permitted space would become asymmetrical. To prevent this, Chazal restricted their movement to the east, ensuring the total area of movement remains exactly balanced. Thus, the rabbinic eruv does not "override" the biblical law; it merely shifts the center of the biblical vector, while rabbinic restrictions preserve the structural symmetry required by the Torah.

2. Sha'ar HaMelekh: The Source of the Twelve-Mil Limit

The Sha'ar HaMelekh investigates the Geonic consensus that underpins the Rambam's ruling. The Geonim held that while the 2,000-cubit limit is rabbinic, any travel beyond twelve mil violates a biblical prohibition.[^6]

The Sha'ar HaMelekh adduces a powerful proof for the Rambam from the Gemara in Eruvin 25b. The Gemara discusses the rule of yoshvei tzrifin (dwellers of circular hovels) who measure their techum from the doors of their homes.

The Gemara objects to this from the historical reality of the Wilderness encampment: "And they pitched by the Jordan, from Beth-jeshimoth even unto Abel-shittim" Numbers 33:49. Rabbi Johanan testified that this area was three parsaot by three parsaot (twelve mil). The Gemara notes that when the Israelites needed to relieve themselves, they had to walk to the rear of the camp—a distance of twelve mil.

Rava defends the ruling by stating that the Wilderness encampment was a unique historical reality (degeli midbar). The Sha'ar HaMelekh asks: If techumin is entirely rabbinic, why did the Gemara need to answer that the Wilderness was different? If there were no biblical boundaries at all in the desert, the Israelites should have been allowed to walk any distance without restriction!

The fact that the Gemara assumes the twelve-mil boundary of the camp was a hard limit that required special dispensation proves that the twelve-mil limit is indeed a biblical reality rooted in the historical structure of the Wilderness camp.[^7]

3. Yitzchak Yeranen: The Mechanics of Rabbinic Decrees and Chatzi Shiur

The Yitzchak Yeranen defends the Rambam against two formidable challenges raised by the Megillat Esther and other Acharonim.

The "Riding an Animal" Challenge

The Megillat Esther asks: The Gemara in Beitzah 36a states that riding an animal on Shabbat is rabbinically prohibited as a decree (gzeirah) lest one travel outside the techum (implying the 2,000-cubit limit). If the twelve-mil limit is a biblical prohibition carrying lashes, why didn't the Gemara state that the decree was designed to prevent a biblical violation of the twelve-mil limit?[^8]

The Yitzchak Yeranen resolves this by analyzing the psychology of rabbinic decrees:

וע"כ לא חיישינן ברוכב יותר ממהלך שמא יעבור מן התחום אלא כשהוא אסור להלוך יותר מאלפים ואגב ארכיבה לא דייק ואתי להלוך יותר מאלפים... אבל עד י"ב מיל ליכא למיחש כיון דיודע דאסור להלוך יותר מאלפים מדרבנן. [^9]

A rabbinic decree is only enacted to prevent a mistake that is highly likely to occur. A person riding an animal can easily lose track of a short distance like 2,000 cubits and transgress the rabbinic boundary. However, it is highly unlikely that a person would ride a massive distance of twelve mil (approximately twelve kilometers) without realizing they have traveled far. Because the physical magnitude of a twelve-mil journey guarantees conscious awareness, Chazal did not need to formulate their decree around the biblical limit; the immediate threat was the easily crossed 2,000-cubit boundary.

The "Chatzi Shiur" Challenge

The teacher of the Yitzchak Yeranen, Rav Yehuda Ashkenazi, raised a powerful conceptual objection: If twelve mil is the biblical measure of the prohibition, why is walking six mil not forbidden under the rule of chatzi shiur assur min ha-torah (a partial measure of a prohibited act is biblically forbidden)?[^10]

The Yitzchak Yeranen answers with a classic chakirah distinguishing between a quantified prohibition of a substance and a spatial boundary of permission:

דשאני חצי שיעור דהתורה אמרה לא תאכל והיינו כזית... וא"כ כשמתחיל לאכול נמצא מתחיל באיסור... לא כן הכא דכתיב אל יצא איש ממקומו והיינו אחר י"ב מיל נמצא קא מזהיר בפי' דוקא שאחר י"ב מיל הוא דלא יצא אבל קודם שרי... ועד י"ב הם התר גמור ודוק. [^11]

When the Torah prohibits eating a non-kosher substance, the substance itself is inherently forbidden; the kezayit (olive-bulk) is merely the minimum threshold required for punishment. Therefore, eating half a kezayit is still biblically forbidden because one is consuming a prohibited substance.

In contrast, the space within the twelve-mil limit is not "partially forbidden space." The Torah explicitly states, "Remain every man in his place." Within his makom (defined as twelve mil), a person has an absolute, pristine right of movement. Walking six mil is not a "partial violation" of a prohibition; it is the full exercise of a biblical permission. The prohibition only begins at the moment one steps outside the boundary. Therefore, the concept of chatzi shiur does not apply.

4. Tzafnat Pa'neach: The Metaphysics of Yom Tov and Movement

The Rogatchover Gaon, Rav Yosef Rosen, applies his signature conceptual analysis to the Rambam's position on techumin on Yom Tov.

He notes that according to the Rambam, the biblical prohibition of techumin is unique to Shabbat:

הנה מלשון רבינו משמע דדוקא בשבת ס"ל דתחומין דאורייתא... מוכח שם כן דביו"ט רק דבר שהוא מלאכה... [^12]

The Rogatchover explains that techumin is not categorized as a melachah (creative labor). Rather, it is a category of shevitah (spatial cessation of movement), derived from "Remain every man in his place on the seventh day."

On Yom Tov, the Torah only prohibited melechet avodah (labor of service), while permitting melechet ochhel nefesh (food preparation). Because Yom Tov is not defined by the absolute spatial cessation of the "seventh day," the biblical prohibition of techumin does not apply to it.

Furthermore, the Rogatchover connects this to the philosophical inquiry of whether walking is considered an action (mehalech k'oseh ma'aseh dami). On Shabbat, the mere transition of physical presence across a boundary constitutes a violation of shevitah. On Yom Tov, where the focus is solely on the prohibition of physical labor (melachah), mere walking cannot constitute a biblical violation because it lacks the creative, transformative nature of melachah.

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Friction

The Ultimate Kushya: The Scapegoat and the Silent Boundary

The most formidable challenge to the Rambam's position that the twelve-mil limit is d'oraita is raised by the Ramban and the Ra'avad, based on the Gemara in Yoma 66b and Keritut 14a.

On Yom Kippur, the Se'ir HaMeshtaleach (Scapegoat) was sent from the Temple in Jerusalem to a steep cliff in the wilderness known as the tzok. The Mishnah in Yoma 67a states that the tzok was exactly twelve mil from Jerusalem, and there were ten booths stationed along the way to escort the messenger.

The Gemara in Yoma 66b discusses the verse: "And send him away by the hand of an appointed man (ish iti) into the wilderness" Leviticus 16:21. The Sages expound:

"עתי" — ואפילו בשבת, "עתי" — ואפילו בטומאה.

The Gemara asks:

"אפילו בשבת למאי הלכתא?" (For what halachic purpose was it necessary for the Torah to write iti to permit the journey on Shabbat?)

Rav Sheshet answers:

"שאם חלה, מרכיבו על כתפו." (If the goat becomes sick, the messenger may carry it on his shoulders.)

The Friction

If traveling beyond twelve mil is a biblical prohibition carrying the penalty of lashes, and Yom Kippur shares the spatial prohibitions of Shabbat, why didn't Rav Sheshet offer the most obvious answer?

The tzok was twelve mil away. The moment the messenger walks even one cubit beyond the twelve-mil mark to push the goat off the cliff, he violates the biblical prohibition of techumin! The word iti was absolutely necessary to permit the messenger to walk past the twelve-mil biblical boundary.

The fact that Rav Sheshet ignored this obvious answer and instead suggested the highly unusual case of carrying a sick goat (markivo al keteifo) strongly implies that the Gemara assumed there is no biblical prohibition of techumin at twelve mil. If there were, the verse would have been needed for the walk itself!

The Terutz of the Seder Mishnah: The Dynamics of Aseh Doche Lo Ta'aseh

The Seder Mishnah rescues the Rambam with a brilliant analysis of the rules governing when a positive commandment overrides a negative commandment (aseh doche lo ta'aseh).

He begins by establishing that the sending of the Scapegoat is a positive commandment of the public (aseh d'rabbim), which carries immense spiritual weight.

The prohibition of techumin, even according to the Rambam, is a simple negative commandment ("Al yetzei") that does not carry the penalty of karet (spiritual excision) or sekilah (stoning).

According to the fundamental rules of Torah logic, a positive commandment automatically overrides a simple negative commandment (aseh doche lo ta'aseh). Therefore, the messenger would be biblically permitted to walk past the twelve-mil boundary to fulfill the mitzvah of the Scapegoat, even without any special verse! The general rule of aseh doche lo ta'aseh is sufficient to permit the walk.

Why, then, can't the positive commandment automatically permit carrying the sick goat?

Carrying an object in a public domain (hotza'ah) is a major melachah that carries the penalty of sekilah and karet. A positive commandment cannot override a negative commandment that carries the penalty of stoning or excision. Therefore, the general rule of aseh doche lo ta'aseh is powerless to permit the messenger to carry the sick goat.

Now, the Gemara's question, "For what halachic purpose was iti written?" makes perfect sense:

• The Gemara knew that the word iti was not needed to permit the twelve-mil walk, because that walk is a simple lo ta'aseh which is automatically overridden by the aseh of the Scapegoat.
• The only prohibition that could not be overridden by the aseh was the severe labor of carrying (hotza'ah).
• Therefore, Rav Sheshet was forced to explain that the special decree of iti was written to permit carrying the sick goat—a severe violation that required an explicit biblical dispensation to be overridden.

This elegant resolution demonstrates that the Gemara's silence regarding the twelve-mil boundary is not a proof against the Rambam; rather, it is a direct consequence of the systematic rules of aseh doche lo ta'aseh.

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Intertext

1. The Biblical Paradigm: The Levite Cities

The concept of a 2,000-cubit boundary is not a rabbinic invention; it is patterned after a biblical model found in the laws of the Levite cities:

"ומדותם מחוץ לעיר את פאת קדמה אלפים באמה ואת פאת נגב אלפים באמה..." Numbers 35:5

The Torah designates a 2,000-cubit open space surrounding each Levite city for pasture land and aesthetic beauty. Chazal utilized this exact measure to define the rabbinic boundary of a person's "place" (makom).

This creates a beautiful conceptual parallel: just as the Levite city's identity extends 2,000 cubits into the surrounding fields, a person's legal presence and home base on Shabbat extends 2,000 cubits beyond the physical borders of their city.

2. Codes and Commentaries: Shulchan Aruch vs. Rama

The codification of this dispute in later halachic literature reveals how the Rambam's position continues to shape practical law.

The Shulchan Aruch rules in accordance with the Ramban and the majority of Rishonim:

"תחום שבת הוא אלפים אמה... וכל זה מדרבנן, שאין תחומין מן התורה אלא חוץ לשלוש פרסאות שהוא שנים עשר מיל..." [^13]

The Mechaber (Rav Yosef Karo) initially seems to compromise, noting that beyond twelve mil it is biblical, but in his Beit Yosef, he leans toward the view that the entire institution of techumin is rabbinic.[^14]

However, the Rama is stringent:

"ויש אומרים דאפילו חוץ לי"ב מיל אינו אלא מדרבנן... וטוב להחמיר כסברא הראשונה שהיא דעת הרמב"ם..." [^15]

The Rama rules that one must treat the twelve-mil limit as a biblical prohibition. The Mishna Berurah explains the practical consequence of this ruling:

"ולעניין ספק תחומין... אם הוא בתוך י"ב מיל להקל, ואם הוא חוץ לי"ב מיל להחמיר..." [^16]

If a doubt arises regarding a boundary within twelve mil, we rule leniently (safek d'rabbanan l'kula). However, if the doubt involves traveling beyond twelve mil, we must rule stringently (safek d'oraita l'chumra) because we treat the Rambam's position as a binding halachic concern.

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Psak/Practice

The conceptual battle between the Rambam and his interlocutors lands in concrete halachic practice through several key parameters:

1. Safek Techumin in Modern Travel

If a person is traveling on Shabbat under permitted circumstances (such as a medical emergency or to save a life) and the emergency resolves, they must remain within their immediate location.

• If they are unsure whether they have traveled more than 2,000 cubits from their original city, they may walk back, relying on the leniency of safek d'rabbanan l'kula.
• However, if they suspect they have traveled beyond twelve mil, they cannot return or walk beyond four cubits, because we treat the twelve-mil limit as a safek d'oraita which must be resolved stringently.

2. The Mechanics of Eruvin

Because we rule that the 2,000-cubit limit is rabbinic, an eruv techumin is highly effective. However, an eruv can never permit someone to walk more than twelve mil from their original city.

Even if one were to place multiple eruvin in a chain, the absolute limit of twelve mil remains a biblical wall that cannot be breached through rabbinic legal mechanisms.

3. Meta-Psak Heuristics: Bavli vs. Yerushalmi

This sugya highlights a crucial aspect of the Rambam's methodology. The twelve-mil limit is explicitly mentioned in the Talmud Yerushalmi Yerushalmi Eruvin 1:10, but is absent from the Talmud Bavli.

The Rambam's willingness to codify a biblical prohibition based on the Yerushalmi—even when the Bavli seems silent or indifferent—demonstrates his holistic approach to the oral tradition.

Where the Bavli does not explicitly reject a tradition found in the Yerushalmi, the Rambam accepts the Yerushalmi as an authoritative source of the Sinaitic transmission (ha'atakah).

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Takeaway

The laws of techumin reveal that Shabbat rest is not merely a cessation of physical labor, but a profound anchoring of human presence. By defining twelve mil as the biblical limit of "place," the Torah establishes that a person's physical movement must remain conceptually bound to their community, reflecting the historical encampment where the Jewish people first rested together in the wilderness.

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Footnotes

[^1]: Mishneh Torah, Sabbath 27:1–2. [^2]: See Rambam's Introduction to the Mishneh Torah, where he defines ha'atakah as the chain of transmission from Moses. [^3]: Sefer HaMitzvot, Negative Commandment 321. [^4]: Ramban, Sefer HaLikutot, Eruvin 17b. [^5]: Ohr Sameach, Hilchot Shabbat 27:1:2. [^6]: Sha'ar HaMelekh, Hilchot Shabbat 27:1:1. [^7]: Ibid., citing Eruvin 25b. [^8]: Megillat Esther, Negative Mitzvah 321. [^9]: Yitzchak Yeranen, Hilchot Shabbat 27:1:1. [^10]: Citing Rav Yehuda Ashkenazi (author of Tuv Ta'am v'Da'at). [^11]: Yitzchak Yeranen, Hilchot Shabbat 27:1:1. [^12]: Tzafnat Pa'neach, Hilchot Shabbat 27:1:1. [^13]: Shulchan Aruch, Orach Chayim 397:1. [^14]: Beit Yosef, Orach Chayim 397. [^15]: Rama, Orach Chayim 397:1. [^16]: Mishna Berurah, Orach Chayim 397:1, sub-paragraph 4.