Chullin 90

Hook

The light of a single oil lamp flickers against the damp stone walls of a butcher's workshop in the old Mellah of Fez. Before the master menaker—the ritual porger—lies the hindquarter of a freshly slaughtered calf. His fingers, calloused yet possessing the sensitivity of a master lutenist, trace the complex topography of the animal's thigh. This is not mere food preparation; it is a sacred extraction, a surgical liturgy. With a slender, curved knife, he peels back the layers of translucent fat, seeking the glistening, silver-white thread of the gid hanasheh—the sciatic nerve.

This nerve, which carries the memory of our patriarch Jacob’s midnight struggle on the banks of the Yabbok, must be removed with absolute, unflinching precision. In the Sephardi and Mizrahi world, this challenging anatomical landscape is not bypassed or sold away to non-Jewish merchants. Instead, it is faced directly. Through the art of nikkur achoraim (porging of the hindquarters), the raw physical animal is meticulously refined, redeemed, and transformed into an altar of holy sustenance.

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Context

To understand the depth of the Talmudic discussion in Chullin 90a and its living expression in our heritage, we must anchor ourselves in the specific soil from which our practices blossomed.

• Place: The Urban Centers of the Ottoman Levant and North Africa. Our journey takes us to the bustling markets of Aleppo (Aram Soba), Syria; the ancient, winding alleys of Marrakech, Morocco; and the high-altitude courtyards of Sana'a, Yemen. In these dense, highly organized Jewish enclaves, the butcher's block was adjacent to the Beit Midrash, and the market inspectors (muhtasib in the wider society, and the rabbinic haverim within the community) walked hand-in-hand.
• Era: The Early Modern Era (16th to 19th Centuries). This was the golden age of codification and communal consolidation. Following the Spanish Expulsion of 1492, the Sephardic exiles (Megorashim) integrated with the indigenous Arabic-speaking Jews (Musta'arabim) of the Middle East. This synthesis created a highly sophisticated, unified legal framework guided by the Shulchan Aruch of Rabbi Yosef Karo (himself an exile who settled in Safed) and the subsequent local enactments (takanot) of North African and Levantine sages.
• Community: The Guilds of the Menakrim. In these communities, the menaker (porger) was not a low-status laborer, but a highly respected communal official. The craft of nikkur was a family secret, passed down from father to son through rigorous apprenticeships. To practice, a menaker required a kabbalah—a written license of high scholarship and moral standing—signed by the leading rabbis of the city. They were the guardians of the community's tables, ensuring that the ancient promise of kosher meat was fulfilled in every home, from the wealthiest merchant to the poorest widow.

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Text Snapshot

The Gemara in Chullin 90a wrestles with the intricate temporal and conceptual relationship between the holiness of sacrifices (kodashim) and the prohibition of the sciatic nerve (gid hanasheh).

Evidently, the limbs of the body are formed before the nerves and sinews, 
and therefore the prohibition of eating sacrificial animals precedes 
the prohibition of eating the sciatic nerve.

The Gemara answers: Even though the prohibition of eating sacrificial 
animals precedes the prohibition of eating the sciatic nerve, 
the prohibition of eating the sciatic nerve comes and takes effect 
upon the offspring of consecrated animals, because the prohibition 
of eating the sciatic nerve adds an extra stringency in that it 
applies also to descendants of Noah...

The Embryonic Timeline: Rashi's Insight

Our master Rashi, in his commentary on Chullin 90a:1:1, explains this delicate developmental choreography:

"אלמא איסור מוקדשין קדים - דמשעה שנוצר הוא קדוש ועדיין לא נוצר הגיד דהא חזינן דיצירת עובר קודמת ליצירת גיד" (Evidently, the prohibition of sacrificial animals is prior—for from the moment the fetus is formed, it is holy, while the sciatic nerve has not yet been formed, as we see that the formation of the embryo precedes the formation of the nerve).

This developmental priority creates a halakhic puzzle: how can the prohibition of the sciatic nerve take effect on a tissue that is already consecrated and forbidden as a sacrifice?

The Hardening of the Flesh: Tosafot and Rabbeinu Tam

In response, the Tosafot on Chullin 90a:1:1 present the profound scientific and conceptual view of Rabbeinu Tam:

"אומר ר"ת משום דמתחלה הכל הוא בשר והבשר עצמו מתקשה אחרי כן ומתלבן ונעשה גיד" (Rabbeinu Tam says: because initially, everything is simple flesh, and the flesh itself subsequently hardens, whitens, and becomes a nerve).

This dynamic transformation of soft embryonic flesh into a distinct, hardened nerve is a beautiful metaphor for spiritual growth. We begin as soft, unformed clay, and through the trials of life—our own wrestling matches with the challenges of existence—our character hardens and takes on a distinct, permanent form.

The Conceptual Mechanics: The Dor Revi'i

Centuries later, Rabbi Moshe Shmuel Glasner, in his masterwork Dor Revi'i on Chullin 90a:1:1, analyzes how these overlapping prohibitions interact. He addresses the challenge: if the nerve is initially soft flesh, it is subject to the laws of sacrifices. When it hardens into a nerve, does the new prohibition of the gid hanasheh displace or override the existing sacrificial status? He explores the concept of chatzi shi'ur (half-measures), demonstrating how the halakhic mind analyzes the microscopic transition from simple tissue to a fully prohibited nerve. This conceptual precision mirrors the physical precision of the Sephardic menaker, who must know exactly where simple fat ends and the forbidden nerve begins.

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Minhag/Melody

The Sacred Anatomy of Nikkur

In the Sephardi and Mizrahi tradition, the practice of nikkur is treated as an intellectual and spiritual art. The Shulchan Aruch in Yoreh Deah 65 outlines the meticulous requirements for removing the sciatic nerve and its surrounding fats (chelev). For our communities, this was never a dry list of rules; it was a living, tactile liturgy.

The master menaker must remove not only the main branch of the sciatic nerve—the gid hanasheh itself—but also its secondary branches, known in our dialects as the shurashim (roots) or sh'luchot (extensions). The Torah teaches in Genesis 32:33:

"עַל־כֵּ֡ן לֹֽא־יֹאכְל֨וּ בְנֵֽי־יִשְׂרָאֵ֜ל אֶת־גִּ֣יד הַנָּשֶׁ֗ה... כִּ֥י נָגַ֛ע בְּכַף־יֶ֥רֶךְ יַעֲקֹ֖ב בְּגִ֥יד הַנָּשֶֽׁה׃" (Therefore the children of Israel eat not the sciatic nerve... because he touched the hollow of Jacob's thigh on the sciatic nerve).

To fulfill this, the Sephardic custom requires nikkur gamur (complete porging). The butcher must carefully dissect the baqa'ah—the deep valley of the thigh. In Morocco, this process was accompanied by the quiet recitation of blessings and verses, transforming the butcher shop into a temple of mindfulness. Every stroke of the knife was a meditation on refinement, separating the forbidden from the permitted, the darkness from the light.

In Yemen, the transmission of this art was incredibly strict. The Mori (communal rabbi and teacher) would personally inspect the butchers, testing them on their anatomical knowledge. They had to trace the path of the three main veins and the surrounding fat pads with their eyes closed, describing the exact pressure required to separate the nerve from the surrounding flesh without severing it prematurely. If a nerve was cut in the middle of extraction, it became much harder to pull out entirely, requiring the butcher to painstakingly excavate the remaining "roots."

           [ The Thigh of the Animal ]
                       │
         ┌─────────────┴─────────────┐
         ▼                           ▼
   [ Permitted Flesh ]       [ Forbidden Nerves & Fats ]
   (To be elevated)          (To be carefully extracted)
         │                           │
         │                           ├─► Gid HaNasheh (Sciatic Nerve)
         │                           ├─► Shurashim (Secondary Roots)
         │                           └─► Chelev (Forbidden Fats)
         ▼                           
   [ Kosher Feast ] ◄────────────────┘
   (Pure and Refined)

Maqam Siga: The Song of the Limping Patriarch

Our legal precision is beautifully balanced by our musical heritage. In the Syrian Jewish community of Aleppo, the liturgy of the Sabbath is organized around the system of Maqamat—classical Arabic musical modes. Each Shabbat, a different maqam is chosen to match the emotional theme of the weekly Torah portion (parashah).

For Parashat Vayishlach, in which Jacob wrestles with the angel and is wounded in his thigh, the Syrian sages designated Maqam Siga.

Siga (a Persian word meaning "third") is a modal structure that built its home in the heart of Middle Eastern music. It is characterized by its unique quarter-tones—notes that lie precisely between the black and white keys of a Western piano. These microtonal inflections give Siga a poignant, searching, and slightly unstable quality.

When the congregation sings the prayers of Shabbat morning in Maqam Siga, the music itself mimics the limping gait of our father Jacob. It is a melody that does not resolve easily. It wobbles, it leans, and it balances on the edge of pain and triumph. The classic pizmon (liturgical song) sung on this Shabbat is "Yismah Har Tzion" (Let Mount Zion Rejoice), its melody winding through the microtones of Siga, reminding the community that our greatest spiritual heights often come from the places where we have been wounded and have learned to limp with grace.

In the Moroccan tradition, during the long winter nights of the Baqashot (early morning petitionary songs), the singers gather in the synagogue at 3:00 AM. When they reach the Shabbat of Vayishlach, the poetry focuses on the wrestling match at the river crossing. The lead cantor sings a solo that rises and falls like the rushing waters of the Yabbok, his voice twisting like the sciatic nerve itself, before the entire congregation bursts into a rhythmic, joyous chorus, celebrating Jacob's ultimate transformation from "Jacob" (the heel-catcher) to "Israel" (he who strives with the divine).

Tu B’Av: From Fractured Thighs to Joyous Dances

Today, as we study this text, we stand in the light of Tu B’Av (the fifteenth day of the Hebrew month of Av).

The Mishnah in Mishnah Ta'anit 4:8 proclaims:

"לֹא הָיוּ יָמִים טוֹבִים לְיִשְׂרָאֵל כַּחֲמִשָּׁה עָשָׂר בְּאָב וּכְיוֹם הַכִּפּוּרִים" (There were no days of joy for Israel like the fifteenth of Av and Yom Kippur).

Tu B'Av is the holiday of love, reconciliation, and the mending of historical fractures. It was the day when the tribes of Israel were finally permitted to intermarry, breaking down the regional and tribal boundaries that threatened to tear the nation apart.

There is a profound spiritual connection between the wounded thigh of Jacob and the dance of Tu B'Av. The gid hanasheh represents the point of vulnerability, the place where the angel of Esau—the force of division, doubt, and exile—struck our patriarch. When Jacob was struck, he began to limp, representing the fractured, uneven walk of a nation in exile, divided against itself.

But on Tu B’Av, the daughters of Jerusalem went out to dance in the vineyards. A dance—specifically a circle dance—is the ultimate correction of a limp. In a circle, there is no front or back, no hierarchy, and no unevenness. Every step is coordinated, every dancer is equidistant from the center, and the collective rhythm carries those who are weary.

By extracting the gid hanasheh through nikkur, we are symbolically removing the root of division and pain from our lives. We take the limb that was once wounded, refine it, and prepare it to step into the joyous, circular dance of unity that defines Tu B'Av. Under the beautiful full moon of Av, the limping gait of the individual patriarch is transformed into the harmonious, collective dance of his descendants.

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Contrast

To Extract or to Avoid: Two Paths of Halakhic Caution

The treatment of the animal's hindquarters represents one of the most fascinating and respectful divergences between Sephardi/Mizrahi practice and Ashkenazi practice. This difference is not a matter of who is "stricter" or "lenient," but rather a reflection of different historical, economic, and sociological environments.

Halakhic Dimension	Sephardi & Mizrahi Practice	Ashkenazi Practice
Primary Approach	Extraction (Nikkur Gamur): Meticulous dissection and removal of forbidden nerves and fats.	Avoidance (Shefichat HaChoraim): Selling the entire hindquarter to non-Jewish markets.
Historical Driver	Economic & Social Integration: Living in Islamic lands with limited non-Jewish markets for non-kosher meat.	Abundant Alternate Markets: Easy access to large non-Jewish markets in European towns.
Scribal & Guild Tradition	Living Transmission: Continuous chain of master menakrim with written licenses (kabbalot).	Fading of the Craft: The practice became rare, reserved only for isolated communities.
Theological Motif	Redemption of Matter: Facing the physical directly, refining it, and elevating every spark.	Protective Boundaries: Creating a secure fence of separation to avoid any risk of error.

In the Ashkenazi communities of Eastern Europe, the labor-intensive nature of nikkur achoraim—which requires hours of highly skilled, painstaking work to remove every trace of the gid hanasheh and the forbidden fats (chelev)—collided with a practical reality. In these regions, there was an abundant and accessible market of non-Jewish neighbors who were eager to purchase the hindquarters of kosher-slaughtered animals.

Because the front half of the animal contains the vast majority of the meat that is easily prepared, and because a single mistake in porging the hindquarters could lead to the severe transgression of eating forbidden fat (which carries the penalty of karet, spiritual excision), the Ashkenazi rabbinate adopted the practice of selling the entire hindquarter to non-Jewish butchers. This practice, known as shefichat hachoraim (discarding the hindquarters), became the standard. Over generations, the actual craft of hindquarter nikkur was largely forgotten in the Ashkenazi world, transforming from a practical challenge into a social taboo.

In contrast, the Sephardi and Mizrahi communities of Morocco, Algeria, Tunisia, Egypt, Syria, Iraq, and Yemen lived under Islamic rule. In many of these societies, local Islamic dietary laws (Halal) and social structures made the sale of Jewish-slaughtered meat to the Muslim majority either economically unfeasible, legally restricted, or socially complex. Meat was a precious, expensive commodity, and discarding half of every animal would have driven the cost of kosher food to heights that the impoverished masses of the Mellah or the Jewish quarters of Baghdad could not bear.

Therefore, the Sephardic sages, following the codification of the Rif Rif Chullin 24b:1 and the Rambam, insisted on preserving the ancient, complex chain of transmission of nikkur. Rather than retreating from the complexity of the animal's anatomy, they leaned into it. They developed highly organized guilds of menakrim who could clean a hindquarter with astonishing speed and absolute halakhic integrity.

These two approaches represent two equally holy paths of halakhic caution:

• The Ashkenazi path is one of protective preservation—creating a safe distance from a complex prohibition to ensure that no error ever occurs.
• The Sephardi path is one of redemptive refinement—stepping directly into the complexity, mastering the anatomy, and carefully separating the holy from the profane so that nothing of God's creation is wasted.

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Home Practice

Cultivating Holy Exaggeration and Mindful Refinement

How can we bring the intermediate-level wisdom of Chullin 90b and the sensory texture of Sephardic practice into our modern, daily lives? We can do so by focusing on one of the most surprising and beautiful concepts discussed in our Talmudic text: the concept of Guzma (holy exaggeration).

In Chullin 90b, the Gemara discussions turn to the language of the Sages, the Prophets, and the Torah itself:

"דִּבְּרָה תוֹרָה לָשׁוֹן הֲבַאי, דִּבְּרוּ נְבִיאִים לָשׁוֹן הֲבַאי, דִּבְּרוּ חֲכָמִים לָשׁוֹן הֲבַאי" (The Torah spoke in exaggerated language, the Prophets spoke in exaggerated language, the Sages spoke in exaggerated language).

They bring examples: the Torah describing cities "fortified up to heaven" Deuteronomy 9:1, or the Sages describing the golden vine at the entrance of the Temple requiring three hundred priests to move it.

The Sages teach us that language is not merely a cold, literal tape measure. To capture the grand scale of spiritual reality, the depth of human emotion, and the beauty of the divine, we must sometimes use colors that are larger than life. This is the secret of the Sephardic poetic soul—the paytanim (poets) who wrote with sweeping, passionate metaphors to express their love for the Divine.

                  [ The Two Paths of Holy Expression ]
                                    │
         ┌──────────────────────────┴──────────────────────────┐
         ▼                                                     ▼
   [ Literal Accuracy ]                                  [ Poetic Exaggeration ]
   (The precise measurement)                             (The "Guzma" of the heart)
         │                                                     │
         ▼                                                     ▼
   "The wall is ten cubits high."                      "Our love is fortified to heaven!"
         │                                                     │
         └──────────────────────────┬──────────────────────────┘
                                    ▼
                     [ Integrated Spiritual Life ]
                     (Where truth meets passion)

Your Practice: The "Guzma" of Gratitude and Love

This week, especially as we celebrate the reconciling energy of Tu B'Av, practice the art of generous, poetic speech in your home.

1. Step Out of the Literal: When expressing gratitude to a spouse, a child, a parent, or a friend, step away from functional, dry language. Do not merely say, "Thank you for making dinner."
2. Elevate Your Language: Use a beautiful, loving exaggeration—a holy guzma—to capture the true spiritual impact of their actions. Say: "Your kindness tonight rebuilt my world," or "The light in your eyes brings the warmth of the sun into our home."
3. Create a Sanctuary of Words: By using generous, expressive, and poetic language, you are mirroring the Sages of the Temple. You are building "cities fortified up to heaven" out of the raw material of your daily relationships.

Alternatively, you can practice the physical mindfulness of the menaker in your kitchen. When preparing food for Shabbat:

• Slow down and treat the removal of unwanted parts (like peeling vegetables, trimming fat, or checking herbs) not as a tedious chore, but as a silent, meditative act of nikkur—separating the sparks of holiness from the husks that surround them.
• As you work, hum a melody of longing, perhaps in the spirit of Maqam Siga, acknowledging that the work of our hands has the power to elevate the physical world into a sanctuary.

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Takeaway

The sciatic nerve is the physical mark of our historical struggles, a quiet reminder embedded in our very anatomy that growth often comes with a limp. Yet, our tradition does not instruct us to run from this complexity.

Through the patient, masterful hands of our menakrim, the beautiful melodies of our maqamat, and the joyous, reconciling dances of Tu B'Av, we learn that even the most challenging parts of our history, our bodies, and our world can be faced, refined, and elevated into holiness. We do not discard the hindquarters of our lives; we porge them with love, transforming our struggles into a song of ascent.