Chullin 79

Hook

When you first open a volume of the Talmud, especially a tractate like Chullin, which deals with the intricate laws of dietary practice, animal slaughter, and ritual fitness, you might wonder what these ancient, hyper-specific discussions have to do with your personal, spiritual journey. You are standing at the threshold of a monumental life decision, exploring the possibility of gerut (conversion) to Judaism. Your mind is likely filled with profound questions of identity, belief, belonging, and the radical restructuring of your life. Why, then, should you spend your precious time reading about the crossbreeding of horses and donkeys, the legal status of a mysterious hybrid creature called a koy, or whether we "concern ourselves with paternity" (chayshinan le-zera ha-av) when classifying an animal?

The answer is as beautiful as it is profound: Judaism is not a religion of abstract, disembodied theology. It is a covenant of concrete, lived reality. In the Jewish tradition, the spiritual and the physical are inextricably bound together. The same analytical precision that our Sages apply to the natural world in Chullin 79a is the very tool they use to understand the boundaries of the human soul, the nature of lineage, and the mechanics of holy transformation.

As someone exploring conversion, you are embarking on a process of redefining your own "classification" in the eyes of Heaven and the Jewish people. You are asking what it means to be grafted onto a new family tree, to claim Abraham and Sarah as your spiritual parents, and to take upon yourself a system of commandments (mitzvot) that will govern your daily existence. This text matters because it teaches us how Jewish law (Halakha) wrestles with complexity, how it honors the "in-between" states of existence, and how it values the slow, deliberate process of defining identity. In these pages of the Talmud, you will find a mirror for your own journey—a journey that requires patience, intellectual honesty, and a willingness to embrace a structured, highly detailed way of being in the world.

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Context

To fully appreciate the depth of Chullin 79a, we must understand its place within the broader tapestry of Jewish law, the journey of conversion, and the spiritual season in which we find ourselves.

• The Halakhic Landscape of Chullin: Tractate Chullin primarily explores the laws of non-consecrated meat and the ethical and ritual boundaries of animal slaughter. The specific discussion in our text revolves around the biblical prohibition of Oto v'et Beno—"it and its offspring"—found in Leviticus 22:28, which states: "And whether it be a bull or a sheep, you shall not slaughter it and its offspring both in one day." The Sages in our text are debating whether this compassionate restriction applies only to the maternal relationship (the mother animal and her offspring) or if we must also "concern ourselves with paternity" (chayshinan le-zera ha-av), thereby applying the prohibition to the father animal and its offspring as well. This leads into a fascinating exploration of hybrid animals, such as mules (the offspring of horses and donkeys) and the koy (a hybrid of a domesticated goat and a wild deer), raising deep questions about how identity is determined when one's lineage is mixed.
• The Beit Din and the Mikveh: For someone exploring conversion, this discussion of lineage and identity has immediate, practical relevance to the conversion process itself. The journey of gerut is not a purely subjective, internal experience; it is mediated by a Beit Din (a rabbinical court of three judges) and culminated in immersion in a Mikveh (a ritual bath). Just as the Sages in our text analyze the "distinguishing characteristics" (simanim) of an animal to determine its status under Torah law, a Beit Din looks for the distinguishing characteristics of a sincere candidate for conversion—your knowledge, your commitment to the mitzvot, your integration into the Jewish community, and your understanding of the covenant. The Mikveh is the ultimate boundary-crossing event, a physical and spiritual rebirth where, halakhically, your legal status is transformed. Understanding how Halakha defines boundaries and statuses in the natural world helps you appreciate why the Beit Din and the Mikveh are so central to the integrity of your own transition.
• Shabbat Chazon – The Shabbat of Vision: Our exploration of this text takes place against the backdrop of Shabbat Chazon, the Shabbat of Vision, which immediately precedes the fast of Tisha B'Av (the ninth of Av). On this Shabbat, we read the prophetic vision of Isaiah Isaiah 1:1-27, which begins with a harsh critique of the Jewish people's spiritual failures but ends with a promise of redemption: "Zion shall be redeemed with justice, and they that return to her with righteousness." Shabbat Chazon is a time for deep introspection, a time to look past the surface level of our lives and envision a rebuilt, holy structure—both the physical Temple in Jerusalem and the spiritual sanctuary of our own souls. For a prospective convert, this season of Chazon (vision) is a powerful reminder that the goal of Jewish life is to build a structured, intentional existence out of the ruins of a chaotic world. It invites you to envision your future Jewish self, grounded in the ancient rhythms of the covenant, even as you navigate the complexities and uncertainties of the transition.

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Text Snapshot

The following passage from Chullin 79a serves as the focal point of our study. It captures the heart of the rabbinic debate over paternity, hybridity, and the legal status of those creatures that exist between categories:

And according to the opinion of Ḥananya, the reason for his ruling is that it is written “it,” which indicates a male, and it is written “its offspring,” teaching that the prohibition applies to that parent whose offspring clings to it, which indicates a female. Therefore, this prohibition applies to both males and females.

Rav Huna bar Ḥiyya says that Shmuel says: The halakha is in accordance with the opinion of Ḥananya. And Shmuel follows his line of reasoning, as we learned in a mishna (Kilayim 8:4): Rabbi Yehuda says: With regard to two animals that are born from a female horse, even if the father of one is a donkey and the father of the other is a horse, they are permitted to mate with one another... But to mate animals that are born from a female donkey with animals that are born from a female horse... is prohibited, due to the prohibition of diverse kinds.

And... Rav Yehuda says that Shmuel says: This is the statement of Rabbi Yehuda, who says: One need not be concerned with its paternity in determining the species of an animal, as the species is determined solely by the mother. But the Rabbis say: The species of an animal is determined according to both its mother and its father...

A dilemma was raised before the Sages: Is Rabbi Yehuda certain that one need not be concerned with its paternity... or perhaps he is uncertain?

...The Gemara concludes that actually this mishna is in accordance with the opinion of the Rabbis, and it is referring to a case of a deer who mates with a female goat, and the Rabbis... are simply uncertain whether one needs to be concerned with its paternity or one need not be concerned...

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Close Reading

To unlock the spiritual treasures hidden within this dense legal discussion, we must look closely at how the Sages and their commentators unpack these concepts. We will explore two primary insights that speak directly to the heart of the conversion journey: the weight of spiritual parentage and the sacred status of the "in-between."

Insight 1: The Weight of Paternity and Spiritual Parentage (Chayshinan Le-Zera Ha-Av)

The Gemara begins by exploring the opinion of Hananya, who argues that the prohibition of slaughtering an animal and its offspring on the same day applies to both the father and the mother. To understand the mechanics of this debate, we must look at the classic commentators.

The Rosh (Rosh on Chullin 5:1:2) outlines the textual debate between the Rabbis and Hananya. The Rabbis argue that because the Torah uses the maternal connection elsewhere to teach compassion (such as the law of sending away the mother bird in Deuteronomy 22:6), the law of Oto v'et Beno must similarly be restricted to the mother. However, Hananya looks at the specific language of the verse in Leviticus 22:28:

חנניא אומר נוהג בין בזכרים בין בנקיבות... כתיב אותו דמשמע זכר וכתיב בנו מי שבנו כרוך אחריו דמשמע נקיבה הילכך נוהג בין בזכרים בין בנקיבות.

Hananya says: It applies both to males and to females... It is written "it" (oto), which implies a male, and it is written "its offspring" (bno) — one whose offspring clings to it, which implies a female. Therefore, it applies both to males and to females.

The Rashba (Rashba on Chullin 79a:1) and Tosafot (Tosafot on Chullin 79a:1:1) ask a crucial textual question: If Hananya is correct, why didn't the Torah simply write "the child" (ben) instead of the more complex "its offspring" (bno)? They explain that the word bno specifically denotes the intimate, physical reality of the offspring "clinging" (karuch) to the parent, which is most visibly seen with the mother. Yet, by using the masculine pronoun oto ("it"), the Torah deliberately forces us to include the father. As Rabbeinu Gershom (Rabbeinu Gershom on Chullin 79a:1) summarizes:

הילכך נוהג בין בזכרים כו' כלומר בין באב ובנו בין באם ובנה.

Therefore, it applies both to males... meaning, both between the father and his offspring, and between the mother and her offspring.

What is the deeper spiritual meaning of this debate for someone exploring gerut? It centers on the concept of chayshinan le-zera ha-av—whether we "concern ourselves with paternity" in determining identity.

In Jewish law, biological Jewish identity is matrilineal; a child born to a Jewish mother is Jewish, regardless of the father's identity. However, when a person undergoes gerut, a radical shift in spiritual genealogy occurs. The Talmud teaches that a convert who immerses in the mikveh is like a newborn child (ger she-nitgayer k'tinok she-nolad dami). You are leaving behind your biological lineage in the spiritual realm and being grafted onto the covenantal family of Israel.

And who becomes your father and mother? In the Jewish liturgy, when a convert is called to the Torah or named in legal documents, they are called ben (son of) or bat (daughter of) Avraham Avinu (our father Abraham) and Sarah Imenu (our mother Sarah).

By adopting Hananya's perspective metaphorically, we see that Judaism deeply "concerns itself with paternity" when it comes to the spirit. Abraham is called the Av Hamon Goyim—the father of a multitude of nations Genesis 17:5. He is not merely the biological ancestor of the Jewish people; he is the spiritual father of every single person who chooses to walk the path of the covenant. When you stand before the Beit Din, you are not asking to join a mere social club or adopt a set of philosophical ideas. You are asking to have your spiritual parentage rewritten. You are declaring that the "clinging" (karuch) of your soul is toward Abraham and Sarah, that their values, their history, their suffering, and their triumphs are now yours.

Furthermore, the Gemara's discussion of Rabbi Yehuda's uncertainty (safek) is highly instructive. The Sages wrestle with whether Rabbi Yehuda is certain that we ignore paternity, or if he is uncertain. Ultimately, the Gemara concludes:

שמע מינה ספוקי מספקא ליה שמע מינה.

Conclude from it that he is uncertain. Indeed, conclude from it.

In the process of conversion, there is a sacred role for safek (uncertainty). You may experience moments of profound doubt. You might ask: "Am I really ready? Do I truly belong? Will the Jewish people accept me? Will God accept me?"

The Talmud's willingness to build an entire legal system around the reality of uncertainty teaches us that safek is not a sign of failure; it is a sign of seriousness. To wrestle with the weight of your identity, to acknowledge that you are navigating a complex transition where your past and your future are meeting, is a deeply Jewish act. The Sages do not brush uncertainty under the rug; they analyze it, honor it, and create boundaries to protect it. Your own moments of uncertainty during your discernment process are holy ground. They are the crucible in which a sincere, durable Jewish soul is forged.

Insight 2: The Koy and the Status of the In-Between

The second half of our text introduces us to one of the most famous and enigmatic creatures in rabbinic literature: the koy. The koy is a hybrid animal, specifically defined by Rav Hisda as the offspring of a domesticated goat (ez) and a wild doe (tzviyah), or vice versa.

The legal challenge of the koy is immense. In Jewish law, domesticated animals (behemah) and wild animals (chayah) have completely different rules. For example, when you slaughter a wild animal, you are commanded to perform kisuy ha-dam—covering the blood with earth Leviticus 17:13. This mitzvah does not apply to domesticated animals. Furthermore, the priestly gifts (matnot kehunah)—the foreleg, the cheeks, and the maw—must be given to a Kohen (priest) from a domesticated animal Deuteronomy 18:3, but not from a wild one.

So, what do we do with the koy? It is a creature of the "in-between." It has the horns of a goat but the tail of a deer. It is partially domesticated and partially wild.

The Gemara debates whether the koy is subject to the law of Oto v'et Beno (it and its offspring). The Rabbis and Rabbi Eliezer disagree on how to classify it. The Gemara asks:

מאי קוי... אלא באיל שבא על צבייה וילדה נקבה וילדה זכר ושחטה לה ולבנה...

What is the koy?... Rather, it is in the case of a goat that mates with a doe, and she gives birth to a female offspring, and this female offspring gives birth to a male offspring, and one slaughters her and her male offspring on the same day...

The Rabbis hold that we must be concerned with paternity, and since the word "sheep" (seh) in the Torah can mean "even if it is only partially a sheep," the koy is subject to the restriction. Rabbi Eliezer disagrees, holding that we do not concern ourselves with paternity, and therefore the koy follows its wild mother entirely, exempting it from the law.

The Rif (Rif Chullin 27a:6) summarizes this discussion, highlighting that because of the inherent uncertainty of the koy's status, we must act stringently in all directions:

שמע מינה דחנניא הלכתא כותיה... ורבי אליעזר ספוקי מספקא ליה...

Conclude from it that the halakha is like Hananya... and Rabbi Eliezer is uncertain...

Because of this uncertainty, a koy cannot be slaughtered on a Festival (Yom Tov) because we are unsure if we are obligated to cover its blood. We cannot risk performing the labor of digging soil on a holiday for a mitzvah that might not actually apply.

For a person in the midst of the conversion process, the koy is an incredibly powerful metaphor. The period of gerut—which can last for years—is a prolonged "in-between" state. You are no longer who you used to be; you have stepped away from the theological, cultural, and perhaps familial structures of your upbringing. Yet, you are not yet halakhically Jewish; you have not yet stood before the Beit Din or immersed in the mikveh.

This "in-between" space can feel deeply uncomfortable. You might feel like a spiritual koy—neither fully wild nor fully domesticated, belonging to two worlds and yet fully to neither. You attend synagogue, but you cannot be counted in a minyan (the prayer quorum of ten). You celebrate Shabbat, but halakhically you may still need to perform a minor act of creative labor to avoid violating the prohibition of a non-Jew keeping Shabbat. You are learning the language of the Jewish soul, but your accent still feels foreign to your own ears.

The Talmud's treatment of the koy offers immense comfort and validation for this stage of your journey. Notice how the Sages treat the koy: they do not dismiss it as an anomaly, nor do they force it into a category where it does not fit. Instead, they devote pages of brilliant, rigorous analysis to its unique status. They validate its complexity. They create a specific, honored space in Jewish law for that which is "in-between."

Your time as a prospective convert is not a spiritual waste of time or a mere waiting room. It is a sacred, necessary state of being. Just as the koy possesses qualities of both the wild deer (with its free, untamed spirit) and the domesticated goat (with its grounded, disciplined presence), you are integrating your unique life history with the structured discipline of the Torah. The Jewish tradition does not ask you to erase your past; it asks you to bring your entire self—all of your "hybrid" experiences, your unique insights, and your personal history—and elevate them within the covenant. Your "in-betweenness" is not a defect; it is a holy, beautiful process of becoming.

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Lived Rhythm

How do we take these abstract talmudic discussions of species, paternity, and "distinguishing characteristics" and turn them into a concrete, lived reality on the path to conversion?

In Chullin 79a, the Gemara suggests that if we do not know the parentage of a hybrid animal, we can determine its species by looking at its physical and vocal characteristics:

...אביי אמר: אי קולה עבה — בת חמורה, אי קולה צרוד — בת סוסה. ורב פפא אמר: אי אודניה רברבן וזנבה זעירא — בת חמורה, אי אודניה זעירן וזנבה רבה — בת סוסה.

...Abaye says: If its voice is deep, it is the offspring of a female donkey; if its voice is shrill, it is the offspring of a female horse. And Rav Pappa says: If its ears are large and its tail is small, it is the offspring of a female donkey; if its ears are small and its tail is large, it is the offspring of a female horse.

As someone exploring conversion, you must begin to cultivate your own Jewish simanim—your own "distinguishing characteristics." You do this by changing the "voice" of your daily life and developing "ears" that are tuned to the frequency of the covenant.

Your concrete next step is to establish a structured, daily rhythm of Brachot (Blessings) and Torah Study. This is how you begin to reshape your spiritual voice.

The Practice of Daily Brachot

A blessing (brachah) is a radical act of mindfulness. It is a declaration that nothing in this world is mundane, and that every physical act—eating, drinking, seeing a rainbow, waking up in the morning—is an encounter with the Divine.

1. Start with the Morning Blessings (Birkot HaShachar): Every morning, upon waking, Jews recite a series of blessings thanking God for the basic functions of life—for opening the eyes, for straightening the bent, for providing our daily needs. Acquire a Jewish prayer book (Siddur) with English translation and transliteration. Make it a daily habit to sit quietly for ten minutes each morning and recite these blessings.
2. Learn the Blessings over Food: Before you eat or drink, make the appropriate blessing. If you eat bread, say the Hamotzi Mishnah Berakhot 6:1. If you drink water or eat a piece of fruit, say the corresponding blessing. This practice forces you to slow down, to recognize God as the source of your sustenance, and to transform the biological necessity of eating into a holy service.
3. The Impact: By reciting these blessings, your "voice" changes. You are no longer speaking the language of a consumer; you are speaking the language of a priest in the sanctuary of daily life.

The Structured Learning Plan

Just as the Gemara requires rigorous intellectual engagement, your journey requires a consistent, disciplined learning plan. You cannot build a Jewish life on feelings alone; it must be built on knowledge.

1. Set a Fixed Time (Kove'a Itim): Dedicate a specific time every week—without fail—for Jewish study. Treat this as an unbreakable appointment with God.
2. Focus on Halakha and Jewish Philosophy:
   • Halakha: Begin studying the practical laws of Shabbat, Kashrut (dietary laws), and family purity. Excellent introductory texts include To Be a Jew by Rabbi Hayim Halevy Donin or The Sabbath by Abraham Joshua Heschel.
   • Torah: Read the weekly Torah portion (Parashah) with the commentary of Rashi. This will help you understand how the Sages read the biblical text and how the written Torah is translated into lived practice.
3. Keep a Study Journal: Write down your questions, your struggles, and your insights. This journal will be an invaluable resource when you eventually sit before the Beit Din, as it will document the honest, step-by-step evolution of your Jewish soul.

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Community

The Talmud is not a book to be read in isolation. It is a transcript of a multi-generational, communal conversation. It is a record of Sages arguing, questioning, and seeking truth together.

In our text, the Gemara relates a beautiful, practical detail about Rabbi Abba:

אמר ליה רבי אבא לשמעיה: כי מעיילת לי כודניאתא בריספק, עיין בהני דדמיאן להדדי... ועייל...

Rabbi Abba said to his servant: If you bring me mules attached to a wagon [rispak], look for those that are similar to each other in their voices and the sizes of their ears and tails, and bring those for me, in order not to violate the prohibition of diverse kinds.

Rabbi Abba understood that for his wagon (rispak) to move forward smoothly, the animals pulling it had to be in harmony. They needed to share a common nature, a common pace, and a common direction.

As a prospective convert, you cannot pull your spiritual wagon alone. You need a community. You need to find those whose "voices" and "ears" are aligned with yours, who are striving to live a life of holiness and covenant.

Here is how you can connect with the community:

Find Your Rabbi and Mentor

The first and most critical step in the conversion process is to find a Rabbi who can guide you. This relationship is not just about getting "signed off" on your conversion; it is about finding a spiritual father or mother who can help you navigate the complexities of your new identity.

1. Visit Local Synagogues: Attend services at different synagogues in your area. Look for a community where the services resonate with your soul, where the community is welcoming, and where the Rabbi's teachings inspire you.
2. Schedule an Initial Meeting: Contact the Rabbi and ask for a short meeting to discuss your interest in Judaism. Be honest about where you are in your journey. Do not be discouraged if the Rabbi initially hesitates or challenges your sincerity; historically, Rabbis are instructed to gently discourage potential converts to ensure their motivations are pure and that they understand the immense commitment of Jewish life.
3. Look for a Mentor: Ask the Rabbi to connect you with an experienced member of the community—someone who can act as a guide, host you for Shabbat meals, and help you navigate the practical, day-to-day realities of Jewish living.

Join a Study Group or Find a Chevruta

Judaism is learned through partnership. A Chevruta is a study partner with whom you wrestle over texts, debate ideas, and share insights.

1. Seek a Partner: Look for another person in your community—either another conversion candidate or a born Jew who wants to deepen their learning—to study with once a week.
2. Join a Class: Enroll in an "Introduction to Judaism" course or a weekly Talmud class at your local synagogue or Jewish Community Center (JCC). This will provide you with a structured learning environment and a community of peers who are also on a journey of discovery.
3. Engage with Sincerity: When you study, do not be afraid to ask questions or express your struggles. The Jewish study hall (Beit Midrash) is a place where honest doubt and rigorous questioning are celebrated, not feared.

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Takeaway

The journey of gerut is one of the most courageous, beautiful, and demanding paths a human being can choose to walk. It is a decision to step out of the default patterns of the world and enter into a binding, eternal covenant with the Creator of the Universe and the Jewish people.

As we have seen in our study of Chullin 79a, Jewish law is not afraid of complexity, uncertainty, or the "in-between" states of life. Whether discussing the paternity of a mule or the hybrid nature of a koy, the Sages teach us that every detail of existence is worthy of holy attention, and that identity is something to be defined with absolute sincerity and legal precision.

Do not rush this process. Embrace the period of being a "spiritual koy." Value the slow, deliberate work of reshaping your voice through brachot and tuning your ears through Torah study. Find your community, connect with a Rabbi, and let your soul be slowly grafted onto the ancient tree of Abraham and Sarah.

There are no guarantees on this path, and the commitments are real and heavy. But for those whose souls are truly "clinging" (karuch) to the covenant, there is no greater joy, no deeper beauty, and no more meaningful way to live. May your vision (chazon) be clear, your steps be steady, and your heart be open as you walk this sacred path of return.