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Mishneh Torah, Tithes 13-14
Sugya Map
The halachic landscape of demai (produce purchased from an am ha'aretz, where we suspect the appropriate tithes were not separated) sits at the intersection of rabbinic stringency (chumra) and pragmatic leniency (kula). In Chapters 13 and 14 of Hilchot Ma'aser, Maimonides maps out the structural boundaries of this rabbinic decree (she'at hagezeirah). The core issue is the delineation of where, when, and upon what the Sages imposed the status of demai, and conversely, where the baseline assumption of exemption (patur) remains intact.
┌────────────────────────────────────────┐
│ JURISDICTION OF DEMAI DECREE │
└───────────────────┬────────────────────┘
│
┌─────────────────────────┴─────────────────────────┐
▼ ▼
┌──────────────────────┐ ┌─────────────┐
│ GEOGRAPHIC BOUNDARIES│ │ SPECIES │
└───────────┬──────────┘ └──────┬──────┘
│ │
┌──────┴──────┐ ┌──────┴──────┐
▼ ▼ ▼ ▼
┌─────────┐ ┌──────────┐ ┌─────────┐ ┌─────────┐
│Olei │ │Olei │ │Watched/ │ │Wild/ │
│Bavel │ │Mitzrayim │ │Cultivated│ │Hefker │
│(Kziv in)│ │(Kziv out)│ │(Liable) │ │(Exempt) │
└─────────┘ └──────────┘ └─────────┘ └─────────┘
The Primary Issues:
- The Taxonomy of Exemption: How do we define species that are inherently exempt from demai due to their classification as wild or ownerless (hefker)?
- Geographic Jurisdiction: What are the territorial limits of the demai decree? How do we resolve cases of trans-boundary agricultural trade (e.g., the Tyre and Sidon markets)?
- The Mechanics of Separation: Under what conditions can one separate tithes from one batch of demai for another, and when does the suspicion of mixed origins (mamin al she'eino mino or min hachiyuv al hapatur) invalidate the act?
Primary Sources:
- Mishnah Demai 1:1 (Exemptions for wild species).
- Mishnah Demai 1:3 (Exemptions for non-food uses and mixtures).
- Mishnah Demai 2:1 (Geographical indicators of Eretz Yisrael produce).
- Mishnah Demai 5:3 (Bakers, distributors, and batch-tithing).
- Mishnah Ma'aserot 1:2 (Defining the threshold of edible fruit development).
- Mishnah Ma'aserot 5:6 (Vinegar from grape dregs).
Nafke Minot (Practical & Conceptual Ramifications):
- The Nature of the Hefker Exemption: Is the exemption of wild fruits based on their actual status as ownerless, or is it a presumption (chazakah) that governs our behavior even in the face of contradictory testimony?
- The Wholesaler (Situn) vs. Private Owner (Ba'al Bayit): Does the prohibition of tithing from one batch of purchased goods for another stem from a certain mixture of obligations (vadai chiyuv and vadai patur), or is it a rabbinic safeguard against statistical doubt?
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Text Snapshot
Let us examine the precise formulation of Maimonides in Mishneh Torah, Hilchot Ma'aser 13:1:
"פירות שחזקתן מן ההפקר, כגון השיתין והרימין והעוזררין ובנות שוח וספיחי סcommon... פטורין מן הדמאי. הלוקח אותן מעם הארץ אינו צריך להפריש מהן אלא תרומת מעשר ומעשר שני, שחזקתן מן ההפקר. ואפילו אמר לו עם הארץ "אינן מעושרין" הרי אלו פטורין, עד שיוודע לו שהן מן השמור."[^1]
Linguistic & Grammatical Nuances
The Rambam employs the term "פירות שחזקתן מן ההפקר"—fruits whose presumption is that they are ownerless—rather than simply saying "fruits that are ownerless." This is highly deliberate. The exemption of these fruits from demai does not require us to verify that this specific piece of fruit was actually left ownerless in a field. Rather, the species itself carries an objective, systemic chazakah of being hefker.^Mishnah Demai 1:1
Let us analyze the specific botanical terms mentioned here, which are critical for delineating the legal boundaries of the exemption:
- השיתין (Ha-Shitin): Identified by Rabbi Adin Steinsaltz as wild figs (תאנים מדבריות).[^2] They grow without cultivation and are thus categorically exempt from the tithe-obligation since they lack a private owner (patur mi-din hefker).^Mishnah Demai 1:1
- הרימין (Ha-Rimin): Identified as wild jujube (שיזף בר), a thorn-bearing desert tree.[^3]
- העוזררין (Ha-Uzrarin): Identified as hawthorn (פרי בהיר דומה לתפוח קטן, שגדל על שיח העוזרד הקוצני), producing small, apple-like wild fruits.[^4]
- בנות שוח (Bnot Shuach): White figs that take three years to ripen, or alternatively, pine nuts from the stone pine (אורן הסלע), which are harvested from wild forests.[^5]
The grammatical syntax of the Rambam's ruling is striking: "ואפילו אמר לו עם הארץ 'אינן מעושרין' הרי אלו פטורין"—"Even if the am ha'aretz explicitly tells him, 'They are not tithed,' they remain exempt." Normally, we apply the rule of shavyei anafshei chaticha d'issura (a person's self-declaration can forbid an object to himself).[^6]
Yet here, because the species carries an objective chazakah of originating from hefker, the subjective testimony of the am ha'aretz is utterly dismissed. We assume either that the am ha'aretz is mistaken in his legal assessment of what requires tithing, or that he is lying to make his produce seem cultivated and therefore of higher quality. The objective status of the cheftza (the object) overrides the subjective testimony of the gavra (the person).[^7]
Readings
The Hefker Exemption: Ontological Status vs. Presumption of Exemption
How do we understand the exemption of wild fruits? Is it an ontological exemption built into the laws of ma'aserot (i.e., hefker is fundamentally exempt from the biblical obligation), or is it a specific leniency in the rabbinic decree of demai?
┌────────────────────────────────────────┐
│ THE ONTOLOGY OF HEFKER IN DEMAI │
└───────────────────┬────────────────────┘
│
┌─────────────────────────┴─────────────────────────┐
▼ ▼
┌──────────────────────────────┐ ┌──────────────────────────────┐
│ RABBI KORKUS │ │ CHAZON ISH │
├──────────────────────────────┤ ├──────────────────────────────┤
│ • Exemption is based on the │ │ • Exemption is a rabbinic │
│ objective, systemic │ │ definition of "Rov." │
│ "Chazakah d'Hefker." │ │ │
│ • The Am Ha'aretz's words │ │ • The Am Ha'aretz's words │
│ are rejected because of │ │ are rejected because we │
│ agricultural ignorance. │ │ assume he is bragging. │
└──────────────────────────────┘ └──────────────────────────────┘
1. The Ri Korkus (Rav Yosef Korkus)
In his commentary on Hilchot Ma'aser 13:1, the Ri Korkus addresses the mechanics of why the am ha'aretz's testimony ("they are not tithed") is rejected. He explains that wild produce is exempt from terumot and ma'aserot at the biblical level because it has no owner at the time of its critical processing (gmar melachah).[^8]
When the Sages instituted the decree of demai, they only applied it to produce that is typically cultivated and guarded (shameur). Since the majority of wild figs (shitin) are hefker, the Sages did not include them in the scope of their decree.
The am ha'aretz's statement "they are not tithed" is legally meaningless: since the species is exempt by default, any attempt by the am ha'aretz to tithe it would be invalid anyway. The am ha'aretz is simply exhibiting ignorance of the law by assuming that because he gathered them, they now require tithing. The objective chazakah of the species remains unchallenged.[^9]
2. The Chazon Ish (Demai, Siman 1)
The Chazon Ish offers a different conceptualization of this exemption. He argues that the exemption of these wild species from demai is not because they are halachically defined as hefker in every instance, but because they represent a category of produce where the likelihood of them being cultivated is statistically negligible.
The am ha'aretz's statement "they are not tithed" is interpreted by the Chazon Ish not as halachic ignorance, but as a marketing ploy. The am ha'aretz wants the buyer to think that these are high-quality, cultivated garden figs rather than dry, wild shitin. Since we know he has a commercial incentive to lie, his testimony is dismissed, and we fall back on the baseline statistical majority (rov) that these species are wild.^Mishnah Demai 1:1
This leads to a profound nafka mina (ramification): If we have absolute, independent verification (e.g., reliable witnesses) that these specific wild figs were actually grown in a guarded garden (shameur), do they require tithing?
- According to the Ri Korkus, they do, because the objective status has shifted from hefker to shameur.[^10]
- According to the Chazon Ish, if the Sages excluded this entire species from the demai decree due to its general classification, it might remain exempt from demai even if this specific batch was guarded, because we do not split rabbinic categories (lo plug rabbanan).
The Rambam appears to side with the Ri Korkus, as he concludes: "עד שיוודע לו שהן מן השמור"—"until it is known that they grew from produce that was guarded." Once it is known, the presumption is broken, and the obligation of demai returns.[^11]
The Geographic Enigma of Tyre and Sidon
In Hilchot Ma'aser 13:6-7, Maimonides rules on the geographic distribution of demai in the border markets of Tyre and Sidon:
"הלוקח מן האוצרות בצור--פטור מן הדמאי... ואם נכנס חמור אחד טעון פירות לצור, פטור מן הדמאי... הלוקח מן האוצרות מצידון--חייב בדמאי, מפני שהיא קרובה לארץ ישראל... ואם לקח מן החמרין בצידון--פטור מן הדמאי, שחזקתן שהביאו מחוצה לארץ."[^12]
┌─────────────────────────────────────────────────────────────────────────┐
│ THE TYRE VS. SIDON PARADOX │
├────────────────────────────────────┬────────────────────────────────────┤
│ TYRE │ SIDON │
├────────────────────────────────────┼────────────────────────────────────┤
│ • Storehouses (Otzarot): EXEMPT │ • Storehouses (Otzarot): OBLIGATED │
│ (Assume local, non-Israel fruit) │ (Assume imported from Israel) │
│ │ │
│ • Single Donkey (Chamarin): EXEMPT │ • Caravans (Chamarin): EXEMPT │
│ (Assume local fields of Tyre) │ (Assume long-distance Diaspora) │
└────────────────────────────────────┴────────────────────────────────────┘
1. The Radbaz (Rav David ibn Zimra)
The Radbaz unpacks the underlying logic of this geographical distinction. Tyre, although geographically close to the northern border of Eretz Yisrael (near the border city of Kziv), has a larger agricultural hinterland of its own that is outside the land of Israel (chutz la-aretz). Therefore, when one purchases from the local storehouses (otzarot) of Tyre, we apply the rule of rov (majority): most grain stored there comes from the local, exempt fields of Tyre, not from the land of Israel.^Mishnah Demai 1:3
However, if a caravan of donkey-drivers (chamarin) enters Tyre, we suspect they traveled a longer distance from the interior of Eretz Yisrael (where the land was inhabited by the Olei Bavel), and thus their produce is subject to demai.[^13]
Conversely, Sidon is extremely close to the border of Eretz Yisrael. Its local storehouses are assumed to import directly and constantly from the fertile Jewish fields of Galilee. Therefore, the storehouses of Sidon are obligated in demai.
But why are the donkey-drivers in Sidon exempt? The Radbaz explains that because Sidon is so close to Eretz Yisrael, local donkey-drivers do not need to form large caravans to transport goods over such short distances. If we see a large caravan of donkey-drivers entering Sidon, they must have come from deep within the Diaspora (further north or east), and therefore their goods are exempt.[^14]
2. The Kaftor VaFerach (Estori HaParchi, Chapter 11)
The author of the Kaftor VaFerach offers a geographical-logistical reading. He notes that the distinction between Tyre and Sidon is based on the trade routes of the ancient Levant. Sidon was a major maritime terminal for the trade coming from Damascus and the deep Diaspora.
Therefore, any long-distance caravan (chamarin) entering Sidon is assumed to be carrying Damascus produce (which is exempt from demai). Tyre, on the other hand, was the primary trading partner for the agricultural surplus of Upper Galilee.
The Kaftor VaFerach establishes a foundational rule for the geography of halacha: we do not merely calculate geometric distance; we must analyze commercial flows. Proximity (kurva) is a function of trade networks, not just physical cubits.[^15]
The Lomdus of Tithing from One Batch to Another
In Hilchot Ma'aser 14:1, Maimonides transitions to the mechanics of tithing from one batch of purchased produce for another:
"הלוקח מן הסיטון וחזר ולקח ממנו פעם שנייה--לא יפריש מזה על זה, ואפילו הן ממין אחד... שמא אותו שמכר לו ראשונה מעם הארץ היה שהוא דמאי, וזה שמכר לו באחרונה מחבר היה שהוא פטור."[^16]
┌─────────────────────────────────┐
│ TITHING FROM BATCH TO BATCH │
└────────────────┬────────────────┘
│
┌─────────────────────────┴─────────────────────────┐
▼ ▼
┌──────────────────────────────┐ ┌──────────────────────────────┐
│ THE SITUN (WHOLESALER) │ │ THE BA'AL BAYIT (PRIVATE) │
├──────────────────────────────┤ ├──────────────────────────────┤
│ • Purchases from many sources│ │ • Sells only his own produce │
│ • May mix Demai & Exempt │ │ • Single source of origin │
│ • CANNOT tithe batch-to- │ │ • CAN tithe batch-to-batch │
│ batch due to doubt of │ │ (Uniform halachic status) │
│ "Me-Chiyuv al Ha-Patur" │ │ │
└──────────────────────────────┘ └──────────────────────────────┘
1. Rabbi Chaim Halevi Soloveitchik (Chiddushei Rabbeinu Chaim, Hilchot Terumot)
Rav Chaim Soloveitchik of Brisk analyzes the prohibition of tithing from one batch of demai to another when purchased from a wholesaler (situn). The core halachic prohibition is me-chiyuv al ha-patur (separating tithes from an obligated batch of produce to exempt a batch that is already exempt, or vice versa), which is biblically invalid.^Mishnah Demai 5:3
Rav Chaim asks: since both batches of produce are demai (and therefore both have the exact same status of safek—doubtful obligation), why can we not tithe from one to the other? They are halachically identical!
To resolve this, Rav Chaim introduces a fundamental distinction in the nature of safek (doubt) in halacha:
- The Subjective Doubt (Gavra): To the purchaser, both batches are identical in their uncertainty.
- The Objective Reality (Cheftza): In reality, one batch was grown by an am ha'aretz (and is objectively obligated in tithing) while the other was grown by a chaver (and is objectively exempt).
When the Sages permitted tithing demai from one batch to another (as they did for a private seller, ba'al bayit), they only did so when there is a chazakah of uniform origin. A private seller is presumed to sell only his own crop; therefore, both batches are objectively of the same status (either both obligated or both exempt).
But a wholesaler (situn) buys from multiple farmers. Therefore, the two batches are objectively non-homogenous. The rabbinic status of demai cannot override the objective, ontological reality of the cheftza. If you tithe from one to the other, you run a high risk of performing an act that is objectively me-chiyuv al ha-patur, which is completely invalid.[^17]
2. The Steipler Gaon (Kehillat Yaakov, Demai)
The Steipler Gaon expands on Rav Chaim's thesis but frames it through the lens of berera (retrospective clarification). When one separates tithes from batch A for batch B, the act of tithing requires a conceptual connection between the two batches.
If batch A is tevel (untithed) and batch B is chulin (already tithed), the separation is a "non-event" (lo asa klum). In the case of a situn, because the sources of the two batches are completely dissociated, there is no conceptual mechanism to link them.
The Steipler argues that the Sages did not create a new category of "demai-obligation" that exists as an independent halachic entity. Rather, demai is simply a state of unresolved safek tevel. Because the doubt is unresolved, we must treat each purchase from a situn as a distinct halachic universe. You cannot use the unresolved doubt of Universe A to resolve the unresolved doubt of Universe B.^Mishnah Demai 5:3
Friction
Kushya 1: The Invalidity of Over-Tithing Demai (Ma'aser 13:19)
In Hilchot Ma'aser 13:19, Maimonides writes:
"המתקן את הדמאי... מעשיו קיימין. ואם בא לתקן את הדמאי כדרך שמפרשין את הוודאי, להפריש תרומה גדולה ומעשרות--אין מעשיו כלום."[^18]
The Kushya of the Ra'avad
The Ra'avad of Posquières immediately attacks this ruling with immense force:
"א"א (=אמר אברהם) זה שיבוש גדול!" ("This is a great error!")[^19]
The Ra'avad's argument is conceptually straightforward: If a person goes above and beyond, treating his demai (which is only doubtfully untithed) with the maximum stringency of vadai tevel (definitely untithed) by separating the great terumah (terumah gedolah) and the subsequent tithes, why should his actions be "of no consequence" (ein ma'asav klum)?
At worst, he has separated terumah unnecessarily from a batch that may have already had its terumah removed by the am ha'aretz. While this might be a waste of produce, the act of separation should still be halachically valid b'di'avad (post facto).
How can Maimonides declare that the separation is completely void? This implies that if the produce was indeed tevel, it remains tevel even after this rigorous separation!
┌────────────────────────────────────────────────────────┐
│ THE OVER-TITHING CONFLICT (MA'ASER 13:19) │
└───────────────────────────┬────────────────────────────┘
│
┌─────────────────────────┴─────────────────────────┐
▼ ▼
┌──────────────────────────────┐ ┌──────────────────────────────┐
│ RA'AVAD │ │ KESEF MISHNEH │
├──────────────────────────────┤ ├──────────────────────────────┤
│ • "Great error!" │ │ • It is "Mefaresh she-lo │
│ • Over-tithing should be │ │ ke-din" (invalid order). │
│ valid post facto. │ │ • If he separates Terumah │
│ • The produce should at │ │ Gedolah, he violates the │
│ least be permitted. │ │ rabbinic sequence of Demai.│
└──────────────────────────────┘ └──────────────────────────────┘
The Terutz: The Kesef Mishneh and the Ri Korkus
The Kesef Mishneh (Rav Yosef Karo) and the Ri Korkus defend Maimonides by diving into the conceptual mechanics of rabbinic authority and the definition of shem (halachic designation).
The Error of Sequence (Mefaresh she-lo ke-din): The Sages established that the am ha'aretz is trusted regarding the great terumah (terumah gedolah), as even the most ignorant Jews were careful not to violate the severe prohibition of eating terumah (which carries the penalty of mitah bi-yedei shamayim—death by divine hand).^Mishnah Demai 1:1 Therefore, the great terumah has already been separated from demai.
If one now attempts to separate great terumah again, he is creating a "designation in error" (mefaresh shem terumah b'ta'ut). In halacha, if you declare an item to be terumah under the mistaken assumption that it is required, the designation is entirely void. It does not take effect because the intent (da'at) was based on a false premise.^Mishnah Demai 5:1
The Structural Integrity of the Tithe Sequence: If we were to validate his act of separating great terumah, we would be forced to treat that separated portion as holy terumah, which must be given to a priest (kohen) and cannot be eaten by a non-priest.
However, since the original am ha'aretz already separated the true terumah, this new "terumah" is actually non-holy produce (chulin). If a priest eats it thinking it is terumah, he may treat it with holy restrictions unnecessarily, or conversely, if a non-priest eats it because he knows it's not real terumah, it looks like a violation of the law.
To prevent this structural chaos in the food supply, the Sages declared: Any act of tithing that deviates from the prescribed formula of the rabbinic decree is completely void. The Rambam's formula is binary: you either tithe according to the rules of demai, or you do nothing. There is no middle ground of "extra-legal stringency."
Kushya 2: The Guest/Worker Crumb Paradox (Ma'aser 14:9)
In Hilchot Ma'aser 14:9, Maimonides rules:
"פועלים או אורחים שהיו מסובין ואוכלן, והותירו פרוסות--צריך לעשר פרוסה ופרוסה בפני עצמה."[^20]
The Kushya
This ruling presents a glaring conceptual contradiction. In Hilchot Ma'aser 10:11, the Rambam himself rules that one is permitted to feed demai to poor people and to guests (achalat arai—temporary eating).^Mishnah Demai 3:1
If guests are halachically permitted to eat demai without it being tithed at all, why must the host tithe the leftover crumbs (parusot) that they leave behind? Furthermore, if they were all reclining and eating from the same table, and presumably from the same loaves of bread, why can the host not tithe from one leftover slice for all the other leftover slices? Why does Maimonides require him to tithe each slice individually (parusa u-parusa be-fnei atzmah)?
┌──────────────────────────────────┐
│ THE CRUMB TITHING PARADOX │
└────────────────┬─────────────────┘
│
┌─────────────────────────┴─────────────────────────┐
▼ ▼
┌──────────────────────────────┐ ┌──────────────────────────────┐
│ THE PERMISSION STAGE │ │ THE LEFTOVER STAGE │
├──────────────────────────────┤ ├──────────────────────────────┤
│ • Guests/Workers eat Demai │ │ • Once left over, food │
│ without tithing. │ │ reverts to the host. │
│ • Permitted as "Achalat │ │ • Host must tithe before │
│ Arai" (temporary/charity). │ │ storing or eating. │
└──────────────────────────────┘ └──────────────────────────────┘
The Terutz: The Radbaz and the Rash Sirilio
The resolution lies in analyzing the transition of the produce from "temporary use" back to "permanent storage," combined with the suspicion of mixed origins.
The Reversion of Ownership: While the guests or workers are eating, the food is in a state of achalat arai (temporary consumption), which the Sages exempted from demai as a form of social welfare to encourage hospitality and fair employment.^Mishnah Demai 3:1
However, once the meal is over and the guests depart, the leftover slices revert to the possession of the host. The host is not eating arai; he is reclaiming his inventory for permanent storage (keva). At this moment of reversion, the temporary exemption evaporates, and the obligation of demai is instantly reactivated.[^21]
The Suspicion of Private Imports: But why must he tithe each crumb individually? If they all sat at his table, did the bread not come from his own kitchen?
The Rash Sirilio (on Yerushalmi Demai) explains that we suspect one of the guests or workers may have brought a slice of bread in his pocket from his own home and placed it on the table. Alternatively, one of the guests might have been a chaver (who tithes scrupulously) and he privately tithed his own slice before eating, while another guest was an am ha'aretz who did not.
If the host tithes from slice A for slice B, he may be tithing from a slice that is already exempt (either because it was brought by a chaver or because it was already tithed) for a slice that is obligated. Because the physical table became a mixing ground for various individuals' food, we can no longer apply the chazakah of uniform origin. Each leftover crumb must therefore be treated as a sovereign halachic unit, requiring individual rectification.[^22]
Intertext
Shulchan Aruch, Yoreh Deah 331: The Geography of Jewish Settlement
To understand how Maimonides' mapping of the borders of Eretz Yisrael lands in the broader corpus of halacha, we must turn to the Shulchan Aruch, Yoreh Deah 331, which codifies these geographic laws:
┌────────────────────────┐
│ HALACHIC BORDERS │
└───────────┬────────────┘
│
┌──────────────────────────┴──────────────────────────┐
▼ ▼
┌──────────────────────────────┐ ┌──────────────────────────────┐
│ OLEI MITZRAYIM │ │ OLEI BAVEL │
├──────────────────────────────┤ ├──────────────────────────────┤
│ • From Egypt to Kziv. │ │ • From Kziv inward. │
│ • Sanctified in First Era. │ │ • Sanctified in Second Era. │
│ • Exempt from Demai. │ │ • Subject to Demai. │
└──────────────────────────────┘ └──────────────────────────────┘
The Shulchan Aruch adopts the Rambam's distinction between the two historical eras of sanctification:^Mishnah Demai 2:1
- קדושה ראשונה (The First Sanctification): The land conquered by those who ascended from Egypt (Olei Mitzrayim). This sanctification was nullified when the Jews were exiled to Babylonia.
- קדושה שנייה (The Second Sanctification): The land inhabited by those who returned with Ezra (Olei Bavel), which extends from Kziv inward. This sanctification remains holy for agricultural purposes for all time.
The Shulchan Aruch rules that the rabbinic decree of demai was only applied to the territory of the Olei Bavel (from Kziv inward).^Mishnah Demai 2:1 The land of the Olei Mitzrayim (outside Kziv, up to the river of Egypt) is exempt from demai, though it remains obligated in terumot and ma'aserot if the produce is vadai untithed.[^23]
Responsa of the Radbaz (Vol. II, Siman 643): The Status of Modern Imports
In a fascinating trans-boundary case, the Radbaz was asked about agricultural produce brought from Egypt and Syria into the land of Israel during the 16th century.
The Radbaz utilizes the principles established in Hilchot Ma'aser 13:4-5. The Rambam states that if we know produce was grown in the territory of Olei Bavel, the laws of demai follow it even if it is exported to the Diaspora.
The Radbaz rules that in the modern era, since the majority of agricultural land in Israel is owned by non-Jews (during the Ottoman period), we apply the rule of rov (majority): most produce found in the markets of Jerusalem or Safed does not come from Jewish-owned land that is subject to the biblical obligation of ma'aserot.
Therefore, the Radbaz heavily relies on the geographic exemptions of the Rambam to alleviate the burden of tithing on the impoverished Jewish community of Safed, demonstrating how the conceptual boundaries of demai serve as a vital economic valve for Jewish survival in Eretz Yisrael.^Mishnah Demai 2:1
Psak/Practice
The Contemporary Reality: Demai in Modern Israel
How do these intricate laws of demai manifest in contemporary halachic practice?
┌──────────────────────────────────┐
│ MODERN ISRAELI AGRICULTURE │
└────────────────┬─────────────────┘
│
┌─────────────────────────┴─────────────────────────┐
▼ ▼
┌──────────────────────────────┐ ┌──────────────────────────────┐
│ THE DEMAI STATUS │ │ THE TEVEL VADAI SHIFT │
├──────────────────────────────┤ ├──────────────────────────────┤
│ • Historically: Doubtful. │ │ • Today: High probability │
│ • Lenient rules applied. │ │ of untithed Jewish crops. │
│ │ │ • Treated as "Tevel Vadai" │
│ │ │ in many open markets. │
└──────────────────────────────┘ └──────────────────────────────┘
In modern Israel, the agricultural sector is highly centralized, but a significant portion of Jewish farmers do not observe the laws of tithing. If one purchases produce in an open-air market (shuk) in Jerusalem or Tel Aviv from an uncertified vendor, what is the status of this produce? Is it demai or tevel vadai (definitely untithed)?
1. The Ruling of the Chazon Ish (Shevi'it, Siman 5)
The Chazon Ish ruled that in the modern era, the historical category of demai has undergone a dramatic shift. Originally, demai was a decree based on the assumption that the majority of common people (ammei ha'aretz) tithed their produce, and only a minority did not.^Mishnah Demai 1:1
Today, however, because the secularization of agriculture has led to a situation where the majority of non-religious Jewish farmers do not tithe at all, the statistical probability has inverted.
Therefore, produce purchased from an uncertified Jewish vendor in Israel cannot be treated with the leniencies of demai (such as the exemption for non-food uses or mixtures). It must be treated as tevel vadai (definitely untithed) because we follow the contemporary rov (majority) of non-observance.[^24]
2. The Derech Emunah (Hilchot Ma'aser 13, R' Chaim Kanievsky)
Rabbi Chaim Kanievsky, in his monumental commentary Derech Emunah, codifies the practical step-by-step process for modern Israeli consumers:
- Certified Produce: Produce with a reliable rabbinical certification (hechsher) is completely exempt, as the tithing was performed at the distribution center.
- Uncertified Produce: Must be tithed immediately without a blessing (hafrashat ma'aserot bela berachah). Because there is still a small doubt (perhaps the farmer was religious, or perhaps it came from a non-Jewish farm), we cannot recite the name of God in the blessing, in accordance with the rule safek berachot l'hakel (doubtful blessings are omitted).[^25]
- The Mechanics of Modern Separation: The consumer must separate slightly more than one-hundredth of the produce (representing the terumat ma'aser), declare it as such, and wrap it in plastic before discarding it in the trash (as it is holy and cannot be eaten by non-priests, but we cannot give it to a priest today due to ritual impurity, tum'at met).[^26]
Takeaway
The laws of demai reveal that halachic categories are not merely dry, mathematical formulas, but dynamic legal systems that balance objective physical reality with the sociological behavior of the community. In tithing, as in all of Torah, the physical borders of the land and the commercial habits of its people weave together to form the sacred geography of Jewish life.
[^1]: Mishneh Torah, Hilchot Ma'aser 13:1. [^2]: Steinsaltz on Mishneh Torah, Hilchot Ma'aser 13:1:1. [^3]: Steinsaltz on Mishneh Torah, Hilchot Ma'aser 13:1:2. [^4]: Steinsaltz on Mishneh Torah, Hilchot Ma'aser 13:1:3. [^5]: Steinsaltz on Mishneh Torah, Hilchot Ma'aser 13:1:4; see also Rambam's Commentary to the Mishnah, Demai 1:1. [^6]: See Babylonian Talmud, Kiddushin 65b regarding the mechanism of shavyei anafshei. [^7]: Ri Korkus, Hilchot Ma'aser 13:1. [^8]: Ri Korkus, Hilchot Ma'aser 13:1; see also Hilchot Terumot 2:11. [^9]: Ri Korkus, ibid. [^10]: Ri Korkus, ibid., citing Steinsaltz on Mishneh Torah, Hilchot Ma'aser 13:1:12. [^11]: Mishneh Torah, Hilchot Ma'aser 13:1. [^12]: Mishneh Torah, Hilchot Ma'aser 13:6-7. [^13]: Radbaz, Hilchot Ma'aser 13:6. [^14]: Radbaz, Hilchot Ma'aser 13:7. [^15]: Kaftor VaFerach, Chapter 11 (p. 242 in the Luncz edition). [^16]: Mishneh Torah, Hilchot Ma'aser 14:1. [^17]: Chiddushei Rabbeinu Chaim, Hilchot Terumot 5:12. [^18]: Mishneh Torah, Hilchot Ma'aser 13:19. [^19]: Hasagot HaRa'avad, Hilchot Ma'aser 13:19. [^20]: Mishneh Torah, Hilchot Ma'aser 14:9. [^21]: Radbaz, Hilchot Ma'aser 14:9. [^22]: Rash Sirilio on Yerushalmi Demai 5:5. [^23]: Shulchan Aruch, Yoreh Deah 331:2. [^24]: Chazon Ish, Shevi'it 5:12. [^25]: Derech Emunah, Hilchot Ma'aser 13:1, Tziyun He-Halachah 14. [^26]: Derech Emunah, ibid., Biur HaHalachah s.v. "Hafrashah".
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