Daf Yomi
Chullin 111
In another voice
Sugya Map
The sugya of Chullin 111a through Chullin 111b serves as the locus classicus for three foundational pillars of the dietary laws (Issur v'Heter): the mechanics of blood extraction and absorption in unique organs (specifically the liver, Kaved), the spatial-kinetic dynamics of flavor transfer during roasting (K'bole'o kach polto and Dama mishrak sharik), and the metaphysical dilution of secondary flavor transmission (Nosein Ta'am bar Nosein Ta'am d'Heteira, henceforth Nat bar Nat).
The primary questions, practical ramifications (nafka minot), and foundational sources map out as follows:
- The Halakhic Status of Liver Blood (Hamra d'Kaveda): Does the blood emitted from a kosher liver during cooking carry the same prohibitory weight as systemic animal blood, or is it treated with leniency because the liver is "mostly blood" (kulo dam)?
- Nafka Mina: If a kosher liver is cooked (bichshal) post-facto with other meat without prior salting or roasting, does it render the entire pot forbidden?
- Primary Sources: Chullin 111a, Tosefta Terumot 8:12, Zevachim 76a.
- Spatial Dynamics of Roasting (Kaveda Ilai Bishra): When roasting liver on a spit directly above meat, does the gravity-induced flow of blood prohibit the underlying meat, or does the heat of the fire prevent absorption?
- Nafka Mina: The permissibility of roasting assortments on a single spit ab initio (l'chatachilah) versus post-facto (b'di'avad).
- Primary Sources: Chullin 111a, Pesachim 74a (regarding Mullita—stuffed meat).
- Secondary Flavor Transmission (Nat bar Nat): When hot, permitted food (e.g., fish) is placed in a clean, hot vessel that recently contained hot meat (ke'arah bat yoma), does the transferred flavor retain the halakhic status of "meat" to prohibit its consumption with dairy?
- Nafka Mina: Using clean meat dishes for hot neutral foods (pareve) intended to be eaten alongside dairy products.
- Primary Sources: Chullin 111b, Beitzah 38b, Avodah Zarah 35b.
- The Potency of Sharpness (Davar Charif): Does cutting a sharp cold food (e.g., a radish) with a meat knife (duchka d'sakina) bypass the lenient rules of secondary flavor, converting a cold transfer into a first-tier prohibition?
- Nafka Mina: The status of a radish cut with a meat knife when eaten with dairy (kutaḥ).
- Primary Sources: Chullin 111b, Avodah Zarah 39a.
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Text Snapshot
The Gemara's discussion opens with a critical distinction regarding the mechanism of prohibition when liver is cooked with other elements:
"ומשום שמנוניתא קאמר דאוסרת את המתבשל עמה לפי שבולע מן הטרפה... אבל דמא דנפיק מינה דכשרה מיבעיא לי"^[Rashi on Chullin 111a:1:1 s.v. "ומשום שמנונית"].
Linguistic and Grammatical Analysis
A precise reading of the Aramaic text reveals a subtle syntax:
"כבדא עילוי בשרא - שרי, דמא משרק שריק. כחלא עילוי בשרא - אסיר, חלבא פסיק ואתי."
The Gemara employs the root sh-r-k (שריק), meaning to slide, glide, or slip. Note the active participle mishrak sharik (sliding, it slides), indicating a continuous, kinetic physical state. The blood does not merely fail to penetrate; it actively glides over the roasting meat's surface due to its viscosity and the outward pressure of the meat's own juices under heat.
Conversely, the milk of the udder (Kachla) is described as pasik v'ati (separated and coming). The milk does not slide; it drips in concentrated, static droplets that adhere (aliz) and slowly diffuse into the fibers of the underlying meat.
Furthermore, note the phrase:
"ליתב לה שבא"
Historically emended by the Haggahot Ya'avetz,^["Haggahot Ya'avetz on Chullin 111a:2"] this colloquialism reflects the intense, almost forced authority (Feed Shabba against his will) Rav Naḥman exercised over his guest, Rava bar Shabba, demonstrating that the permissibility of cooked liver was so clear to Rav Naḥman that any stringency was treated as ignorant self-piety (Yuhara).
Readings
The conceptual anatomy of Chullin 111 splits the Rishonim and Acharonim into distinct analytical camps. Below, we examine the divergent conceptualizations of Kaved, Nat bar Nat, and Davar Charif.
┌───────────────────────────────┐
│ Flavor Transfer (Chullin 111)│
└───────────────┬───────────────┘
│
┌────────────────────────┴────────────────────────┐
▼ ▼
┌─────────────────────┐ ┌─────────────────────┐
│ Secondary Flavor │ │ Sharp Substances │
│ (Nat bar Nat) │ │ (Davar Charif) │
└──────────┬──────────┘ └──────────┬──────────┘
│ │
┌─────┴─────────────────────┐ ┌─────┴─────────────────────┐
▼ ▼ ▼ ▼
┌─────────┐ ┌─────────┐ ┌─────────┐ ┌─────────┐
│ Rashi/ │ │ Rambam/ │ │ Rashi: │ │ Rashba:│
│ Rashba: │ │ Shulchan│ │ Physical│ │ Chemical│
│Weakened │ │ Aruch: │ │ Residue │ │ Change │
│ Flavor │ │ Formal │ └─────────┘ └─────────┘
└─────────┘ │Permit │
└─────────┘
1. The Legal Nature of Nat bar Nat d'Heteira
The core dispute between Rav and Shmuel concerning hot fish placed on a meat plate (dag she'ala al gabei ke'arah) yields two fundamentally different ways to understand how flavor (ta'am) operates in halakha.
Rashi and the Rashba: The "Weakened Flavor" Model
Rashi^["Rashi on Chullin 111b s.v. "דג שעלה בקערה""] and the Rashba^["Torat HaBayit, Bayit Revi'i, Sha'ar Sheni"] maintain that the flavor of meat absorbed into a vessel (Ke'arah), which is subsequently cooked or transferred into a neutral food (the fish), is physically weakened with each successive transfer. By the time it reaches the fish, the meat flavor is a "secondary transmission" (Nosein Ta'am bar Nosein Ta'am).
The Rashba explains that because both transfers occurred while the substances were permitted (d'heteira)—meaning the meat flavor was absorbed into the plate when it was kosher, and the plate transferred it to the fish when both were kosher—the flavor never acquired a "prohibited" status.
It is not that the flavor is physically absent; rather, it is too weak to create a new prohibition when it meets dairy.
Rambam and Tosafot: The "Formal Permit" Model
The Rambam^["Mishneh Torah, Hilkhot Ma'akhalot Assurot 9:23"] formulated a more sweeping leniency. He rules that Nat bar Nat d'heteira is permitted ab initio (l'chatachilah).
To the Rambam, the secondary flavor is not merely "weakened"; it is halakhically nonexistent (ke'man d'leitah). Since the flavor did not originate from an forbidden source, it lacks the legal identity (shem) of meat.
Consequently, you can cook the fish in a meat pot l'chatachilah with the explicit intent of eating it with dairy. This presents a major practical difference (nafka mina) between Sephardic practice (following the Rambam and Shulchan Aruch) and Ashkenazic practice (following the Rama, who requires b'di'avad post-facto status).
2. The Mechanics of Davar Charif (Sharp Foods)
When a radish is cut with a meat knife, the Gemara states that it is forbidden to eat the radish with dairy (kutaḥ). Why does the sharpness of the radish override the leniency of Nat bar Nat?
Rashi: The Physical Lubricant (Shmunit) Theory
Rashi^["Rashi on Chullin 111b s.v. "אגב חורפיה""] argues that the knife is physically coated with a microscopic layer of congealed meat fat (shmunit). Under the physical pressure of the blade (duchka d'sakina), this fatty residue is squeezed off the knife and directly absorbed by the sharp radish.
According to Rashi, the prohibition has nothing to do with absorbed flavor (ta'am kavush). Rather, it is a direct transfer of actual, physical meat grease (ba'ayin).
Nafka mina: If the knife was chemically cleaned with a powerful soap beforehand, cutting a radish would not render it meaty, as there is no physical residue to transfer.
The Rashba: The Chemical Activation Theory
The Rashba^["Torat HaBayit, ibid."] rejects Rashi’s physical grease model. He argues that even if the knife is completely clean and polished (sakin naki v'atuf), cutting a sharp food with it still transfers meat flavor.
The chemical sharpness of the radish reacts with the cold steel of the blade, drawing out the deeply absorbed meat flavor from the metal walls. The pressure of the cut (duchka) acts like heat (bichshal), forcing the knife to release its flavor.
Nafka mina: Even if the knife is completely clean, cutting a radish with it makes the radish meaty. This is the ruling accepted by the Shulchan Aruch.^["Shulchan Aruch, Yoreh Deah 96:1"]
┌────────────────────────────────────────────────────────┐
│ The Radish & Knife Dispute │
├──────────────────────────┬─────────────────────────────┤
│ Rashi's Residue Model │ Rashba's Activation Model │
├──────────────────────────┼─────────────────────────────┤
│ • Focus: Physical grease │ • Focus: Absorbed flavor │
│ on knife blade. │ deep in metal walls. │
│ • Pressure squeezes fat │ • Sharpness + pressure act │
│ directly into radish. │ like physical heat. │
│ • Clean knife = radish │ • Clean knife = radish │
│ remains pareve. │ still becomes meaty. │
└──────────────────────────┴─────────────────────────────┘
3. Conceptualizing Kaved (Liver): Fat vs. Blood
The Gemara asks: If liver cooked with meat is forbidden, is it because of its blood or its fat? Rashi and the Meiri analyze this through the lens of the liver's physical composition.
Rashi's Analysis of Shmunit d'Kaveda
Rashi^["Rashi on Chullin 111a:1:1 s.v. "ומשום שמנונית""] explains that the liver's fat (shmunit) is highly absorbable. If a non-kosher liver is cooked with kosher meat, the fat transfers its flavor immediately and prohibits the meat.
However, if a kosher liver is cooked without salting, the blood it expels only prohibits other pieces if it is absorbed. Rashi introduces a major concept: liver is constantly expelling blood while cooking (tarud liflot). Because it is busy expelling, it cannot absorb.
The blood it releases might prohibit other pieces of meat in the pot, but the liver itself remains permitted because it does not reabsorb its own expelled blood.
The Haggahot Ya'avetz's Clarification
Rabbi Yaakov Emden^["Haggahot Ya'avetz on Chullin 111a:1"] refines Rashi's distinction. He notes that we do not say the blood of a non-kosher liver is less severe than its fat. Rather, the blood of a non-kosher liver is just as forbidden as its meat.
The entire debate about "fat vs. blood" in the Gemara applies only to a kosher liver that was not salted. In that case, we must determine if the raw blood it releases carries the rabbinic or biblical penalty of standard blood once it leaves the organ.
Friction
Kushya 1: The Paradox of Dama Mishrak Sharik vs. Tata'ah Gavar
The Gemara rules that if liver is roasted on top of meat (kaveda ilai bishra), the meat underneath remains permitted because the blood "slides off" (dama mishrak sharik) and is not absorbed.
This presents a major difficulty: We have a well-established rule elsewhere that when hot food falls on cold food, or vice versa, the bottom layer dominates (tata'ah gavar)^["Pesachim 76a"]. Furthermore, we generally rule that heat causes immediate absorption (cham cham b'miktzat cham kulo).
If the meat on the bottom is hot from the fire, how can we say the hot liver blood simply "slides off" without transferring any flavor? The heat should force the meat to absorb the blood instantly!
[ Heat source / Fire ]
│
▼
┌─────────────────┐
│ Liver (Top) │ ──► Expels blood
└─────────────────┘
│
│ (Blood drips down)
▼
┌─────────────────┐
│ Meat (Bottom) │ ──► If hot, why no absorption?
└─────────────────┘ "Dama Mishrak Sharik"
Terutz A: The Rashba's Kinetic Pressure Model
The Rashba^["Torat HaBayit, Bayit Revi'i, Sha'ar Rishon"] resolves this by analyzing the physics of roasting. When meat is roasted over an open flame, it constantly expels its own juices and steam outward. This outward pressure is called ayd d'palit lo bala (while an item is expelling, it cannot absorb).
Because the underlying meat is directly over the fire, it is actively expelling its own juices. The liver blood dripping from above cannot fight this outward flow. It merely slides down the outside of the meat (mishrak sharik) and drips into the fire.
The heat of the fire actually prevents absorption rather than causing it, because it keeps the meat in a constant state of expulsion.
Terutz B: The Ritva's Viscosity Model
The Ritva^["Chiddushei HaRitva, Chullin 111a s.v. "דמא משרק שריק""] offers a different approach, focusing on the physical properties of liver blood during roasting. Unlike standard systemic blood (dam evarim), liver blood is thick and highly viscous.
When exposed to direct heat, it quickly forms a skin or glaze. Because it glazes over so fast, it does not penetrate the pores of the underlying meat. It simply slides off before any molecular transfer can occur.
This explains why this leniency applies only to roasting. If you cooked them together in a pot with liquid, the water would dissolve this glaze, allowing the liver blood to diffuse throughout the entire mixture and render it forbidden.
Kushya 2: Shmuel’s Contradiction on Heat and Salt
We encounter a direct contradiction in Shmuel’s rulings within the same sugya:
- Shmuel says that if hot food is placed in a bowl where meat was salted, it is forbidden to eat it because "a salted food is like a boiling food" (maliach k'roteach)^["Chullin 111b"]. This means salting creates a powerful, hot-like absorption.
- Yet, Shmuel also rules that hot fish placed on a meat plate (dag she'ala al gabei ke'arah) may be eaten with dairy (kutaḥ), because of Nat bar Nat d'heteira.
If salting is as powerful as boiling, then the meat plate must have absorbed a massive amount of intense meat flavor. When hot fish is placed on that plate, how can Shmuel permit it?
The heat of the fish should draw out that intense flavor, making the fish meaty. Why doesn't the rule of "salted is like boiling" turn the plate into a direct source of forbidden mixture when dairy is introduced?
┌─────────────────────────────────────────────────────────────────┐
│ Shmuel's Dual Rulings │
├────────────────────────────────┬────────────────────────────────┤
│ Ruling A: Salting = Boiling │ Ruling B: Nat bar Nat Leniency │
├────────────────────────────────┼────────────────────────────────┤
│ Salted meat in a bowl makes │ Hot fish on a meat plate can │
│ the bowl deeply "meaty." │ still be eaten with dairy. │
├────────────────────────────────┴────────────────────────────────┤
│ Conflict: If the bowl's absorption is so powerful, why doesn't │
│ it instantly make the fish meaty enough to prohibit dairy? │
└─────────────────────────────────────────────────────────────────┘
Terutz: The Tosafot's Structural Distinction
Tosafot^["Tosafot on Chullin 111b s.v. "האי מאן דבעי""] resolve this by distinguishing between the source of the absorbed flavor.
In the case of the salted bowl, the bowl absorbed raw blood (dam p'litat melichah) during the salting process. Because blood is a fundamentally forbidden substance (issur), the bowl now contains absorbed issur. There is no leniency of Nat bar Nat for forbidden substances (Nat bar Nat d'issura is strictly forbidden).
In contrast, the meat plate used for hot food absorbed permitted meat flavor (heteira). The meat was kosher and cooked.
Because the flavor in the plate started out as permitted (heteira), it can benefit from the Nat bar Nat leniency. The flavor is weakened as it transfers to the fish, preventing it from creating a new prohibition when it meets dairy.
The issue is not the strength of the absorption (how hot or salted it was), but the halakhic status of the flavor when it was first absorbed.
Intertext
1. Biblical Foundations: Leviticus 17 and the Status of Liver Blood
The entire discussion of liver blood (Hamra d'Kaveda) rests on how we interpret the biblical prohibition of blood found in Leviticus 17:11:
"כִּי נֶפֶשׁ הַבָּשָׂר בַּדָּם הִיא וַאֲנִי נְתַתִּיו לָכֶם עַל הַמִּזְבֵּחַ לְכַפֵּר עַל נַפְשֹׁתֵיכֶם כִּי הַדָּם הוּא בַּנֶּפֶשׁ יְכַפֵּר."
The Torah prohibits "the blood of the soul" (dam hanefesh), which is the life-sustaining blood that gushes out during slaughter. The Gemara in Keritot 20b derives that only blood that has separated from the meat is biblically forbidden.
Blood that remains inside the meat or organs is treated differently:
- As long as the blood remains inside the liver, it is considered part of the liver itself and is permitted by Torah law.
- Once the liver is cooked, the blood is released (pirash). At this point, it becomes biblically forbidden blood.
This explains why Rabba bar Rav Huna insisted on tearing the liver lengthwise and widthwise (keria l'orech u'l'rochev)^["Chullin 111a"]. Tearing the liver cuts open the major blood vessels (simanim), allowing the blood to flow out freely during roasting so it does not become trapped and forbidden.
┌───────────────────────────────┐
│ Biblical Status of Blood │
│ (Leviticus 17:11) │
└───────────────┬───────────────┘
│
┌────────────────────────┴────────────────────────┐
▼ ▼
┌───────────────────────┐ ┌───────────────────────┐
│ Systemic Blood │ │ Organ Blood (Liver) │
│ (Dam Hanefesh) │ │ (Hamra d'Kaveda) │
└───────────┬───────────┘ └───────────┬───────────┘
│ │
▼ ▼
Biblically Forbidden ┌────────────────┴────────────────┐
from slaughter. ▼ ▼
┌──────────────┐ ┌──────────────┐
│ Inside Organ │ │ Once Emitted │
│ (Permitted) │ │ (Forbidden) │
└──────────────┘ └──────────────┘
2. Halakhic Developments: The Shulchan Aruch and the Pesach Pot
The concept of Nat bar Nat d'heteira is central to a famous debate in the laws of Pesach.
If a clean chametz pot that has not been used in 24 hours (eino ben yomo) is used to boil water on Pesach, can that water be used?
The Shulchan Aruch^["Shulchan Aruch, Orach Chaim 447:10"] applies the Nat bar Nat rule:
- The chametz flavor absorbed in the pot is permitted (heteira) before Pesach begins.
- When the water is boiled in the pot, the chametz flavor undergoes a secondary transfer (Nat bar Nat).
- Because this transfer occurs before Pesach (when chametz is still permitted), the flavor is weakened and nullified. The water remains permitted for use on Pesach.
The Rama^["Rama, ibid."] disagrees. He argues that because the prohibition of chametz on Pesach is extremely severe (chometz b'mashehu—even the tiniest speck is forbidden), we do not rely on the leniency of Nat bar Nat.
He forbids using the water, demonstrating how the theoretical models of flavor transfer discussed in Chullin 111 directly shape the practical laws of the Pesach kitchen.
Psak/Practice
1. Preparing Liver (Hachsharat Kaved)
In modern halakha, we rule strictly regarding the preparation of liver. Unlike standard meat, which can be koshered through salting (melichah), liver contains so much blood that salting is not enough to extract it.
┌───────────────────────────────┐
│ Koshering Meat vs. Liver │
└───────────────┬───────────────┘
│
┌────────────────────────┴────────────────────────┐
▼ ▼
┌───────────────────────┐ ┌───────────────────────┐
│ Standard Meat │ │ Liver │
└───────────┬───────────┘ └───────────┬───────────┘
│ │
▼ ▼
Salting Process Roasting Process
(Standard Melichah) (Direct Fire Only)
The Shulchan Aruch^["Shulchan Aruch, Yoreh Deah 73:1-3"] outlines the mandatory steps:
- Tearing (Keria): The liver must be cut open lengthwise and widthwise, and placed on the fire with the cut side facing down. This allows the major blood vessels to drain completely.
- Roasting (Tzli): Liver can only be koshered by roasting it over an open fire. The heat of the fire draws out the blood.
- Post-Roasting Wash: After roasting, the liver must be rinsed three times to wash away any blood residue left on the surface. Only after this process is complete may the liver be cooked in a pot with other ingredients.
2. Practical Guide to Secondary Flavor (Nat bar Nat)
How do we apply the dispute between Rav and Shmuel to a modern kitchen?
┌─────────────────────────────────────────────────────────────────┐
│ Modern Nat bar Nat Applications │
├────────────────────────────────┬────────────────────────────────┤
│ Sephardic Practice (S.A.) │ Ashkenazic Practice (Rama) │
├────────────────────────────────┼────────────────────────────────┤
│ • Leniency applies ab initio. │ • Leniency applies post-facto. │
│ • Can cook potatoes in a clean │ • Cannot cook potatoes in a │
│ meat pot with the intent of │ meat pot to eat with cheese. │
│ eating them with cheese. │ • If already cooked, they may │
│ │ be eaten on dairy plates. │
└────────────────────────────────┴────────────────────────────────┘
Sephardic Practice (Following the Shulchan Aruch)
The Shulchan Aruch^["Shulchan Aruch, Yoreh Deah 95:1"] permits Nat bar Nat ab initio (l'chatachilah).
If you have a clean meat pot that was used within the last 24 hours (ben yomo), you may boil pasta in it with the explicit intention of serving that pasta with cheese. The secondary transfer of kosher meat flavor into the pasta does not prevent it from being mixed with dairy.
Ashkenazic Practice (Following the Rama)
The Rama^["Rama, ibid."] is more stringent. He rules that we do not rely on Nat bar Nat ab initio.
You may not cook pasta in a meat pot with the intention of eating it with dairy. However, if the pasta was already cooked in the meat pot, it is permitted post-facto (b'di'avad) to eat it with dairy.
Furthermore, if the meat pot was not used in 24 hours (eino ben yomo), even Ashkenazim permit cooking the food in it to eat with dairy.
3. Sharp Foods (Davar Charif) in the Modern Kitchen
The rules of sharp foods remain highly relevant today. Onions, lemons, radishes, and garlic are all classified as davar charif.
If you cut a hot or cold onion with a clean meat knife:
- The onion absorbs meat flavor due to its sharpness and the pressure of the blade (duchka d'sakina).
- The onion is now classified as "meaty." You may not eat it with dairy, nor may you cook it in a dairy pot.
- This rule applies to both Sephardim and Ashkenazim, as the sharpness of the food overrides the standard leniencies of Nat bar Nat.
Takeaway
Halakha does not view flavor as a static, permanent stamp. Instead, it is a dynamic force shaped by physical pressure, chemical sharpness, and the kinetic power of heat. Understanding these forces allows us to navigate the complex boundaries of the kosher kitchen with precision and clarity.
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