Arukh HaShulchan, Orach Chaim 247:1-8

Sugya Map

The Arukh HaShulchan, Orach Chaim 247:1-8, meticulously unpacks the foundational mitzvot of Pru U'Rvu (be fruitful and multiply) and Shevet (settling the land), as well as their practical ramifications. The central issue revolves around the precise definition, scope, and applicability of these mitzvot, particularly concerning who is obligated and what constitutes their fulfillment.

Core Issues

• Definition of Pru U'Rvu: What is the minimum threshold for fulfilling this primordial commandment? Is it two sons, or a son and a daughter?
• Distinction between Pru U'Rvu and Shevet: Are these two separate mitzvot with distinct requirements, or aspects of a single overarching imperative?
• Scope of Obligation: Who is commanded? Men only, or women as well? What if one's children pass away? What if they are psulim (e.g., cheresh, shoteh, katan)?
• Implications for Marriage: Can individuals incapable of procreation (e.g., saris, aylonit) marry? What is the tachtlit (purpose) of marriage in such cases?

Nafka Mina(s)

• Halachic Fulfillment: When is one permitted to cease attempts at procreation, or prioritize other mitzvot (e.g., limud Torah)?
• Women's Status: Does a woman's exemption from Pru U'Rvu impact her obligation to marry or her role in family life?
• Marital Validity: The permissibility and nature of kiddushin for those unable to procreate.
• Post-facto Scenarios: If children die or are psulim, does the obligation rekindle?

Primary Sources

• Tanakh: Bereishit 1:28, 9:1, 35:11 (for Pru U'Rvu); Yeshayahu 45:18 (for Shevet).
• Talmud: Masechet Yevamot 61b-65b (core discussions on Pru U'Rvu, Shevet, women's exemption, saris/ aylonit). Masechet Kiddushin 29b-30a (prioritizing limud Torah).
• Rishonim: Rambam, Hilchot Ishut 15; Rashi and Tosafot on Yevamot loc. cit.; Rosh, Yevamot 6:1.
• Acharonim: Beit Yosef, Even HaEzer 1; Shulchan Aruch, Even HaEzer 1; Bach, Even HaEzer 1; Pri Megadim, Orach Chaim 247.

Text Snapshot

The Arukh HaShulchan, in his inimitable style, begins with the grand declaration of the mitzvah itself:

"מצות עשה לפרות ולרבות, והוא מצוה ראשונה שבתורה, שנאמר 'פרו ורבו ומלאו את הארץ'. ובפרשת נח נאמר 'פרו ורבו', ובפרשת ויחי נאמר 'אני אל שדי פרו ורבו'." – Arukh HaShulchan, Orach Chaim 247:1

This opening establishes the mitzvah's primacy and reiterates its threefold mention in the Chumash, underscoring its fundamental nature. The dikduk of "מצות עשה לפרות ולרבות" rather than "מצוה לפרות ולרבות" emphasizes the action of procreation as the core of the chiyuv. The repetition of the verse in different contexts (creation, post-flood, Yaakov's blessing) suggests a persistent and overarching divine imperative.

Further, the Arukh HaShulchan delineates the minimum fulfillment:

"וכמה שיעור מצוה זו? בן ובת. שנאמר 'ומלאו את הארץ', ולא נאמר 'ומלאוה' – משמע שצריך שימלאוה אחרים ממנו, היינו זכר ונקבה שמהם מתרבים." – Arukh HaShulchan, Orach Chaim 247:2

Here, the Arukh HaShulchan explicates the halacha that Pru U'Rvu requires a son and a daughter, deriving it from the plural form "ומלאו" (and they shall fill) rather than "ומלאוהו" (and he shall fill it). This linguistic nuance, attributed to Beit Hillel in Yevamot 61b, is crucial. The plural "ומלאו" implies a perpetuation that requires both genders to establish a new generative unit, thereby actualizing the milui ha'aretz. The phrasing "שמהם מתרבים" (from whom they multiply) underscores that the mitzvah is not merely about having children, but about establishing a lineage capable of self-perpetuation.

Readings

The Arukh HaShulchan's exposition of Pru U'Rvu and Shevet synthesizes centuries of rabbinic discourse, clarifying distinctions and resolving tensions. We will examine the chiddushim of several Rishonim and Acharonim that underpin the Arukh HaShulchan's rulings, focusing on the definition of fulfillment, the role of women, and the nature of the mitzvot themselves.

Rambam: The Bifurcation of Pru U'Rvu and Shevet

The Rambam, in Hilchot Ishut 15:1-3, offers a foundational framework that distinctly separates Pru U'Rvu and Shevet, a distinction pivotal to the Arukh HaShulchan's analysis. The Rambam's chiddush lies in his precise articulation of two distinct mitzvot, each with its own source and minimum requirement. He states: "מצות עשה לפרות ולרבות, והיא מצוה ראשונה שנצטוו בה אדם הראשון ונוח... ואינה נוהגת אלא באנשים" (It is a positive commandment to be fruitful and multiply, and it is the first commandment given to Adam and Noah... and it applies only to men). He then immediately defines its fulfillment: "אין אדם מקיים מצות פריה ורביה עד שיהיו לו בן ובת" (A person does not fulfill the commandment of Pru U'Rvu until he has a son and a daughter). Critically, he then introduces Shevet: "אף על פי שיש לו בן ובת, הרי זה מצוה להוסיף ולפרות ולרבות, שכל המרבה בנפשות בישראל הרי זה מוסיף מצוה. ועוד אמרו חכמים, שאין העולם נכון אלא בפריה ורביה. וכן צוה ישעיה 'לא תהו בראה לשבת יצרה'" (Even if he has a son and a daughter, it is a mitzvah to add and be fruitful and multiply, for whoever increases souls in Israel adds to the mitzvah. And the Sages also said that the world is only properly settled through Pru U'Rvu. And thus Isaiah commanded, 'He did not create it for chaos, but for settlement'). The Rambam's chiddush is not merely stating there are two mitzvot, but defining their relationship. Pru U'Rvu is the initial chiyuv (obligation) with a specific minimum (son and daughter), while Shevet is an ongoing mitzvah of increasing population, which, though related, is conceptually distinct. The verse "לא תהו בראה לשבת יצרה" (Yeshayahu 45:18) is brought as an independent source for Shevet, indicating that the mitzvah to settle the world exists even if one has fulfilled the minimum of Pru U'Rvu. This suggests a broader imperative: Pru U'Rvu is about establishing a reproductive unit, while Shevet is about populating and developing the world. The Arukh HaShulchan 247:3 echoes this, distinguishing the minimum "בן ובת" for Pru U'Rvu from the broader ideal of "להרבות בבנים ובנות" for Shevet, which can be fulfilled even with one child. The Rambam's clear delineation allows for scenarios where one fulfills one mitzvah but not the other, or where the chiyuv for one is met, but the other continues to apply.

Tosafot on Yevamot 61b: Delving into the Machloket of Fulfillment

The Arukh HaShulchan 247:2, in defining the minimum of Pru U'Rvu as a son and a daughter, explicitly sides with Beit Hillel against Beit Shammai and R. Yehoshua. The Gemara in Yevamot 61b presents this machloket: Beit Shammai hold two sons, R. Yehoshua holds a son and a daughter, and Beit Hillel holds a son and a daughter. The Gemara concludes that the halacha follows Beit Hillel. Tosafot, Yevamot 61b s.v. "בן ובת", offer a crucial chiddush by analyzing the underlying svara (reasoning) of this machloket, particularly Beit Hillel's position. They explain that the pasuk "ומלאו את הארץ" (Bereishit 1:28) implies the continuation of the human race. To "fill the earth" in a self-sustaining manner requires both genders, as a male-only or female-only lineage cannot perpetuate itself indefinitely. Tosafot highlight that the phrase "ומלאו את הארץ" is in the plural, implying future multiplication, which necessitates a pair capable of procreation. Beit Shammai, who require two sons, might interpret "ומלאו" as referring to the man's direct progeny who will themselves be able to fulfill Pru U'Rvu. Two sons would ensure the family line continues through males. R. Yehoshua, on the other hand, aligns with Beit Hillel, indicating that the svara of perpetuation through a male and female is compelling. The chiddush of Tosafot here lies in their emphasis on the purpose of the mitzvah – the long-term perpetuation and filling of the earth – as the determinant of its minimum fulfillment. It's not just about having children, but about establishing a reproductive unit. This nuanced understanding of "ומלאו את הארץ" provides the logical backbone for the consensus halacha adopted by the Arukh HaShulchan. It shifts the focus from merely having a certain number of children to creating a system for continued population growth.

Rashi on Yevamot 65b: The Nuance of Women's Exemption

The Arukh HaShulchan 247:6 states unequivocally that women are exempt from Pru U'Rvu. This fundamental halacha is rooted in the Gemara, Yevamot 65b. The Gemara offers several reasons for this exemption: "לא נאמר אלא לאיש" (it was said only to the man), "איש ולא אשה" (a man, but not a woman), and the concern of "שהיא מסוכנת בלידה" (that she is in danger in childbirth). Rashi, Yevamot 65b s.v. "לא נאמר אלא לאיש", provides a chiddush by clarifying the primary svara for the exemption. He explains that the original command to Adam in Bereishit 1:28, "פרו ורבו", was addressed to "הם" (them, referring to Adam and Chava). However, the Gemara's inference "לא נאמר אלא לאיש" is from a different context: the command given to Noah, "צא מן התיבה אתה ואשתך ובניך ובני נשותיך" (Go out of the ark, you and your wife and your sons and your sons' wives – Bereishit 8:16). Immediately following this, the verse states, "פרו ורבו ומלאו את הארץ" (Bereishit 9:1). Rashi points out that before the command to "פרו ורבו," the men (Noah and his sons) are separated from the women (their wives). Therefore, the subsequent command, even though seemingly plural, is interpreted by the Sages as primarily directed at the men, who are the active agents in bringing about procreation. Rashi's chiddush here is subtle but profound. It moves beyond a simple statement of exemption to reveal a textual basis in the dikduk of the pesukim themselves, interpreted through the lens of derash. While the danger of childbirth (מסוכן) is also mentioned, Rashi's primary explanation grounds the exemption in the very wording and context of the divine command, establishing that the chiyuv was never intrinsically placed upon the woman. This means it's not merely an exemption due to ones (circumstance beyond one's control) but a fundamental absence of chiyuv from the outset. This distinction is crucial, as it implies that even if childbirth were entirely safe, women would still be exempt based on the textual analysis. The Arukh HaShulchan's concise statement "נשים פטורות ממצות פריה ורביה" (247:6) is built upon this fundamental Rashi-esque understanding.

Bach on Tur Even HaEzer 1: The Ongoing Nature of Shevet

The Bach (R. Yoel Sirkis), in his commentary on the Tur, Even HaEzer 1, offers a crucial chiddush regarding the ongoing nature of the mitzvah of Shevet beyond the minimum fulfillment of Pru U'Rvu. The Arukh HaShulchan 247:3, following the Rambam and Shulchan Aruch, affirms that even after having a son and a daughter, it is a mitzvah gedolah to continue having children. The Bach delves into the qualitative difference between the initial chiyuv of Pru U'Rvu and this ongoing imperative. The Bach emphasizes that while Pru U'Rvu is a quantifiable chiyuv that can be fulfilled and thereby completed, Shevet (as derived from "לא תהו בראה לשבת יצרה") is a continuous, aspirational mitzvah to populate the world. His chiddush lies in explaining that Shevet is not merely an expansion of Pru U'Rvu, but a distinct mitzvah with a different character. Pru U'Rvu is a chiyuv gavra (an obligation on the person) to achieve a specific outcome, whereas Shevet is more akin to a chiyuv cheftza (an obligation to the world itself, or a societal imperative) to ensure the land is settled. The Bach explains that Shevet applies even if one already has children, and even if one has fulfilled the Pru U'Rvu requirement. He sees the pasuk from Yeshayahu as establishing an independent mitzvah to ensure the world is not "tohu" (chaos/void) but rather "lashevet" (for settlement). This implies that as long as there is potential for population growth, the mitzvah of Shevet persists. This contrasts with Pru U'Rvu, which, once a son and daughter are born, is technically fulfilled, allowing one to be patur (exempt) from further chiyuv in that specific mitzvah. The Bach's emphasis on the distinct and ongoing nature of Shevet provides a strong halachic basis for the minhag and ideal of having many children, transforming it from a mere pious custom into a continuation of a divine imperative. The Arukh HaShulchan's reference to "מצוה רבה" (a great mitzvah) for continued procreation after the minimum is a direct reflection of this Bachian understanding of Shevet.

Friction

A significant conceptual friction arises when considering the Arukh HaShulchan's discussion in OC 247:8 regarding the permissibility of marriage for a saris (eunuch) or an aylonit (barren woman):

"סריס ואילונית מותרים להנשא זה לזה, וכן סריס מותר לישא אשה כשרה, ואילונית מותרת לישא איש כשר... ובעל הסריס או האילונית, אם אין לו בנים, חייב לישא אשה אחרת ולקיים מצות פריה ורביה." – Arukh HaShulchan, Orach Chaim 247:8

This statement presents a profound challenge: If Pru U'Rvu is the "מצוה ראשונה שבתורה" (first commandment in the Torah) and is widely understood as the primary tachtlit (purpose) of marriage, how can a marriage where its fulfillment is inherently impossible be permissible, and moreover, a mitzvah? The kushya is intensified by the Arukh HaShulchan's explicit instruction that the fertile spouse must still fulfill Pru U'Rvu with another partner if they lack children, highlighting that the primary mitzvah remains unfulfilled in such a union. This suggests a tension between the ideal purpose of marriage and its halachic reality.

The Kushya: Is Pru U'Rvu the Sole Tachtlit of Marriage?

The Gemara in Yevamot 64a explicitly permits a saris and aylonit to marry, stating, "כדתניא, סריס ואילונית מותרים להנשא זה לזה". This permission, codified in Shulchan Aruch, Even HaEzer 5:12, seems to contradict the very essence of kiddushin as a vehicle for Pru U'Rvu. If the Torah commands "פרו ורבו" and this is the inaugural mitzvah for humanity, and the gemara in Kiddushin 29b-30a ties the chiyuv of marriage directly to Pru U'Rvu ("הואיל ואי אפשר בלא אשה"), then how can a union devoid of this capacity be sanctioned? The kushya can be framed as a chakira (conceptual inquiry): Is Pru U'Rvu a conditio sine qua non for the validity of kiddushin, or merely the primary purpose for which chiyuv kiddushin arises for a fertile man? If it were the former, such marriages would be pasul (invalid). Since they are kasher (valid), it implies that Pru U'Rvu is not the sole or even essential condition for the kinyan of marriage. The tension lies in reconciling the gemara's emphasis on Pru U'Rvu as the reason for marriage with its simultaneous permission for sarisim and ayloniyot to marry. What other tachtliot of marriage are so weighty as to permit these unions despite the inability to fulfill the "מצוה ראשונה"?

The Terutz: Marriage for Tikkun HaAdam and Shevet (Beyond Pru U'Rvu)

The most compelling terutz (resolution) posits that while Pru U'Rvu is indeed the primary purpose for which a chiyuv of marriage falls upon a fertile man, it is not the only purpose, nor is it a prerequisite for the validity or even the mitzvah aspect of kiddushin itself. This terutz draws upon a broader understanding of human nature and the societal function of marriage.

1. Tikkun HaAdam (Human Perfection/Completion) and Eizer K'Negdo

The Gemara in Yevamot 62b states, "כל אדם שאין לו אשה אינו אדם שלם" (Any man who has no wife is not a complete man), based on Bereishit 5:2, "זכר ונקבה בראם ויברך אותם ויקרא את שמם אדם" (Male and female He created them... and called their name Adam). This suggests that marriage, beyond procreation, serves a purpose of personal completion and actualization. The Rishonim, such as Rabbeinu Yonah (commentary on Avot 2:16), elaborate on this, explaining that a man without a wife lacks an eizer k'negdo (a helper opposite him), a partner for emotional, spiritual, and social support. The kinyan of kiddushin facilitates the tikkun of the individual by providing companionship, preventing perishut (abstinence/solitude), and establishing a proper household. Even a saris or aylonit can benefit from this aspect of marriage, finding companionship, mutual support, and a structured home life. This tachtlit is independent of procreative ability.

2. Shevet (Settlement) as a Distinct Mitzvah

As discussed in the "Readings" section, the Rambam and Arukh HaShulchan clearly distinguish between Pru U'Rvu (son + daughter) and Shevet (settling the world, even with one child). Even if a saris or aylonit cannot fulfill Pru U'Rvu, they might still contribute to Shevet in a broader sense. While they cannot produce biological children, they can raise children (e.g., adopted children, though adoption does not fulfill Pru U'Rvu directly for the parents, it contributes to the general shevet ha'aretz). More importantly, their marriage itself contributes to the social stability and structure of the world, preventing tohu (chaos) in a societal sense. The mitzvah of "לשבת יצרה" (Yeshayahu 45:18) implies a general imperative for human flourishing and order, which includes family units, even if not directly procreative.

3. Bitul Yichud and Prevention of Znut (Immorality)

Another terutz focuses on the pragmatic aspects of marriage. The Gemara (Kiddushin 29b) discusses the need for a man to marry to prevent hirhur aveira (sinful thoughts) and znut. Even if a saris cannot procreate, the act of marriage provides a framework for permissible intimacy and prevents illicit relationships. For an aylonit, while she can conceive, she cannot carry to term. Marriage still channels her natural desires within a halachically sanctioned framework. This terutz emphasizes the preventative and regulatory function of marriage, which is applicable regardless of fertility. The Arukh HaShulchan's allowance for a saris to marry a kasher woman, and vice-versa, indicates that the marital bond itself has inherent value beyond procreation.

In sum, the terutz is that Pru U'Rvu is indeed a singular, foundational chiyuv on men, prompting them to marry. However, marriage itself is a multi-faceted institution with several other tachtliot that remain operative even in the absence of procreative potential. These include the psychological and spiritual completion of the individual (tikkun ha'adam), the creation of a stable social unit (shevet in a broader sense), and the channeling of human drives within a holy framework (bitul yichud). The Arukh HaShulchan, by permitting these marriages while still obligating the fertile spouse to seek Pru U'Rvu elsewhere, subtly affirms this hierarchy: Pru U'Rvu is paramount, but not exclusive, in defining the mitzvah of marriage.

Intertext

The sugya of Pru U'Rvu and Shevet, as delineated by the Arukh HaShulchan, finds resonant parallels and cross-references in other areas of halacha and Jewish thought, particularly concerning the prioritization of mitzvot and the nuanced understanding of divine commands.

Prioritizing Limud Torah Over Pru U'Rvu (Kiddushin 29b-30a)

A classic intertextual discussion that directly engages with the primacy of Pru U'Rvu is the sugya in Kiddushin 29b-30a concerning the obligation of a man to marry and have children versus his obligation to study Torah. The Gemara presents a scenario where a man must choose between marrying and fulfilling Pru U'Rvu or continuing his intensive Torah study.

"תנו רבנן: מי שיש לו אשה ובנים ובא ללמוד תורה, רשאי. מי שאין לו אשה ובנים ובא ללמוד תורה, אינו רשאי. אמר רב יהודה אמר שמואל: הלכה כדברי אבא שאול, שאמר: מי שאין לו אשה ובנים ובא ללמוד תורה, רשאי, ובלבד שלא יבטל מפריה ורביה." – Kiddushin 29b-30a

The initial statement suggests that one must fulfill Pru U'Rvu before dedicating oneself fully to Torah study. However, Rav Yehuda in the name of Shmuel, citing Abba Shaul, rules that one is permitted to study Torah even if unmarried and childless, "ובלבד שלא יבטל מפריה ורביה" (provided he does not neglect Pru U'Rvu). This phrase "ובלבד שלא יבטל" is the crux of the chakira by Rishonim and Acharonim. Does it mean he must intend to fulfill it eventually, or that he must actively seek a wife while studying?

• Rambam (Hilchot Ishut 15:3) rules that if one is engaged in Torah study and fears that marrying will distract him, he may delay marriage, provided he does not neglect Pru U'Rvu entirely. He specifies that this permission is only for someone "תלמיד חכם העוסק בתורה" (a Torah scholar engaged in Torah). This suggests a delicate balance where limud Torah, especially for a great scholar, can postpone but not abrogate the chiyuv of Pru U'Rvu.
• The Rosh (Kiddushin 1:44) interprets "שלא יבטל" to mean that he should not completely avoid marriage, but if he finds a suitable woman and marries, he can continue his studies. He notes that this leniency is specifically for those whose Torah study is so profound that it benefits the entire community. The Arukh HaShulchan's emphasis on Pru U'Rvu as "מצוה ראשונה" highlights its inherent importance. Yet, the sugya in Kiddushin provides a critical counterpoint: there are instances where another mitzvah can take precedence or at least allow for deferral. This intertext reveals that even the "first mitzvah" is not absolute in its immediate demand, and a hierarchy or balancing act among mitzvot exists. It informs our meta-psak heuristics by demonstrating that the chiyuv of Pru U'Rvu is not a monolithic imperative but interacts dynamically with other chiyuvim, particularly limud Torah, which is considered equal to all mitzvot (Peah 1:1). The permission to delay Pru U'Rvu for Torah study suggests that the chiyuv is ultimately about the outcome (having children) rather than the timing of the marriage, as long as the intent to fulfill it remains.

Mitzvat Yishuv Eretz Yisrael (Settling the Land of Israel)

The mitzvah of Yishuv Eretz Yisrael (settling the Land of Israel) offers another compelling parallel to the sugya of Pru U'Rvu and Shevet, particularly regarding the idea of a continuous, overarching imperative for population and development. The Ramban, in his Hassagot to Sefer HaMitzvot (Mitzvat Aseh 4 of Rambam's omitted mitzvot), argues forcefully for Yishuv Eretz Yisrael as a positive mitzvah derived from Bamidbar 33:53, "והורשתם את הארץ וישבתם בה כי לכם נתתי את הארץ לרשת אותה" (You shall dispossess the inhabitants of the land and dwell in it, for to you I have given the land to possess it). He maintains that this mitzvah is not merely about conquest, but about settlement and populating the land. The parallel emerges in several ways:

1. Continuous Nature: Like Shevet (as distinct from Pru U'Rvu), Yishuv Eretz Yisrael is often understood as a continuous mitzvah, not fulfilled by a single act but by ongoing presence and development. The Ramban emphasizes that the mitzvah persists "לדורות עולם" (for all generations). This mirrors the Arukh HaShulchan's point that even after fulfilling Pru U'Rvu, the mitzvah of Shevet continues, encouraging further procreation. Both mitzvot aim at populating a specific domain – the world in general for Shevet, and Eretz Yisrael specifically for Yishuv Eretz Yisrael.
2. Societal Imperative: Both Shevet and Yishuv Eretz Yisrael carry a strong societal dimension. They are not merely chiyuvim gavra (individual obligations) but contribute to the collective good and the divine plan for humanity and Am Yisrael. The Arukh HaShulchan's emphasis on "ומלאו את הארץ" for Pru U'Rvu and "לשבת יצרה" for Shevet resonates with the idea that human existence is divinely purposed for settlement and flourishing.
3. Conflict with Other Mitzvot: Just as Pru U'Rvu can conflict with limud Torah, Yishuv Eretz Yisrael can conflict with other mitzvot or personal needs (e.g., financial stability, family considerations in the diaspora). Poskim debate the extent to which one is obligated to leave a comfortable situation in the diaspora to settle in Israel. The complexity of these debates mirrors the careful balance required when weighing the "מצוה ראשונה" of Pru U'Rvu against other compelling chiyuvim.

These intertexts reveal that the principles underlying Pru U'Rvu and Shevet – the balance between individual chiyuv and societal good, the distinction between minimum fulfillment and ongoing aspiration, and the dynamic interaction among mitzvot – are not isolated to this sugya but are foundational to Jewish legal and ethical thought.

Psak/Practice

The Arukh HaShulchan's systematic treatment of Pru U'Rvu and Shevet in OC 247:1-8 provides the bedrock for contemporary halachic practice, influencing decisions from personal life choices to broader communal norms.

The Ongoing Obligation and Minhag

The primary psak that lands in practice is the halacha that one fulfills Pru U'Rvu with a son and a daughter, as stated in 247:2. However, the Arukh HaShulchan's emphasis in 247:3 on the mitzvah gedolah to continue having children – rooted in the mitzvah of Shevet – translates into a strong minhag (custom) and societal expectation within observant communities. While technically one is patur from the chiyuv of Pru U'Rvu after a son and daughter, the ideal of having many children is widely embraced. This is not merely a stringency but a practical manifestation of the Rambam's and Bach's understanding of Shevet as an ongoing imperative, ensuring the "לא תוהו בראה לשבת יצרה." Many poskim view having more children as fulfilling a mitzvah rabbah or a chiyuv of Shevet, even if not the specific Pru U'Rvu.

Women's Exemption and Family Planning

The explicit exemption of women from Pru U'Rvu (247:6) is a critical practical point. This means that a woman is not individually obligated to bear children. While a woman is typically considered to be fulfilling a mitzvah by enabling her husband to perform Pru U'Rvu, her personal chiyuv is not to procreate. This has significant implications for family planning decisions. For example, while poskim generally discourage birth control for men who have not fulfilled Pru U'Rvu, women have more leniency in certain circumstances, especially if there are health concerns or if they have already had children and fulfilled Pru U'Rvu through their husband. However, even with the exemption, most poskim would still encourage women to participate in Pru U'Rvu due to the general importance of the mitzvah and the tachtlit of marriage. The Arukh HaShulchan's discussion in 247:7 regarding a woman's potential obligation in Shevet (which he leans against) further underscores that her primary role is not under the same chiyuv as a man's in this regard.

Meta-Psak Heuristics: Balancing Tachtlit and Kinyan

The discussion surrounding sarisim and ayloniyot (247:8) is crucial for meta-psak heuristics. It establishes that while a mitzvah may have a primary tachtlit (e.g., Pru U'Rvu for marriage), the kinyan (legal act) or institution itself can possess inherent value and other valid purposes. Marriage for tikkun ha'adam, companionship, or prevention of znut remains valid and meritorious, even when the primary tachtlit of procreation cannot be met. This principle is applicable in other areas of halacha where the ideal fulfillment of a mitzvah might be unattainable, yet a partial or alternative fulfillment, or the underlying institution, retains its validity and significance. This nuanced approach allows halacha to accommodate complex human realities without compromising the importance of core mitzvot. For instance, it provides a framework for understanding the validity of kiddushin in modern contexts where fertility issues are prevalent, affirming the sanctity of the marital bond even in the absence of biological progeny.

Takeaway

The Arukh HaShulchan elucidates Pru U'Rvu as the seminal mitzvah of establishing a self-perpetuating family unit (son and daughter), distinct from Shevet, the enduring imperative to populate and settle the world. This distinction allows for a flexible halachic framework that prioritizes procreation while recognizing the multi-faceted purposes of marriage and the dynamic interplay between different mitzvot.

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Footnotes:

1. Arukh HaShulchan, Orach Chaim 247:1.
2. Bereishit 1:28; Bereishit 9:1; Bereishit 35:11.
3. Arukh HaShulchan, Orach Chaim 247:2.
4. Yevamot 61b.
5. Rambam, Hilchot Ishut 15:1.
6. Rambam, Hilchot Ishut 15:2.
7. Rambam, Hilchot Ishut 15:3.
8. Yeshayahu 45:18.
9. Arukh HaShulchan, Orach Chaim 247:3.
10. Yevamot 61b.
11. Tosafot, Yevamot 61b s.v. "בן ובת".
12. Arukh HaShulchan, Orach Chaim 247:6.
13. Yevamot 65b.
14. Rashi, Yevamot 65b s.v. "לא נאמר אלא לאיש".
15. Bereishit 8:16; Bereishit 9:1.
16. Arukh HaShulchan, Orach Chaim 247:3.
17. Bach, Tur Even HaEzer 1 s.v. "ומצוה".
18. Yeshayahu 45:18.
19. Arukh HaShulchan, Orach Chaim 247:8.
20. Bereishit 1:28.
21. Kiddushin 29b.
22. Yevamot 64a.
23. Shulchan Aruch, Even HaEzer 5:12.
24. Yevamot 62b.
25. Bereishit 5:2.
26. Rabbeinu Yonah, Perush HaMishnayot Avot 2:16, s.v. "כל מי שאין לו אשה".
27. Yeshayahu 45:18.
28. Kiddushin 29b.
29. Kiddushin 29b-30a.
30. Rambam, Hilchot Ishut 15:3.
31. Rosh, Kiddushin 1:44.
32. Peah 1:1.
33. Ramban, Hasagot al Sefer HaMitzvot, Mitzvat Aseh 4 (Shelo Mana).
34. Bamidbar 33:53.
35. Arukh HaShulchan, Orach Chaim 247:7.## Sugya Map

The Arukh HaShulchan, Orach Chaim 247:1-8, meticulously unpacks the foundational mitzvot of Pru U'Rvu (be fruitful and multiply) and Shevet (settling the land), as well as their practical ramifications. The central issue revolves around the precise definition, scope, and applicability of these mitzvot, particularly concerning who is obligated and what constitutes their fulfillment.

Core Issues

• Definition of Pru U'Rvu: What is the minimum threshold for fulfilling this primordial commandment? Is it two sons, or a son and a daughter?
• Distinction between Pru U'Rvu and Shevet: Are these two separate mitzvot with distinct requirements, or aspects of a single overarching imperative?
• Scope of Obligation: Who is commanded? Men only, or women as well? What if one's children pass away? What if they are psulim (e.g., cheresh, shoteh, katan)?
• Implications for Marriage: Can individuals incapable of procreation (e.g., saris, aylonit) marry? What is the tachtlit (purpose) of marriage in such cases?

Nafka Mina(s)

• Halachic Fulfillment: When is one permitted to cease attempts at procreation, or prioritize other mitzvot (e.g., limud Torah)?
• Women's Status: Does a woman's exemption from Pru U'Rvu impact her obligation to marry or her role in family life?
• Marital Validity: The permissibility and nature of kiddushin for those unable to procreate.
• Post-facto Scenarios: If children die or are psulim, does the obligation rekindle?

Primary Sources

• Tanakh: Bereishit 1:28, 9:1, 35:11 (for Pru U'Rvu); Yeshayahu 45:18 (for Shevet).
• Talmud: Masechet Yevamot 61b-65b (core discussions on Pru U'Rvu, Shevet, women's exemption, saris/ aylonit). Masechet Kiddushin 29b-30a (prioritizing limud Torah).
• Rishonim: Rambam, Hilchot Ishut 15; Rashi and Tosafot on Yevamot loc. cit.; Rosh, Yevamot 6:1.
• Acharonim: Beit Yosef, Even HaEzer 1; Shulchan Aruch, Even HaEzer 1; Bach, Even HaEzer 1; Pri Megadim, Orach Chaim 247.

Text Snapshot

The Arukh HaShulchan, in his inimitable style, begins with the grand declaration of the mitzvah itself:

"מצות עשה לפרות ולרבות, והוא מצוה ראשונה שבתורה, שנאמר 'פרו ורבו ומלאו את הארץ'. ובפרשת נח נאמר 'פרו ורבו', ובפרשת ויחי נאמר 'אני אל שדי פרו ורבו'." – Arukh HaShulchan, Orach Chaim 247:1$^1$

This opening establishes the mitzvah's primacy and reiterates its threefold mention in the Chumash$^2$, underscoring its fundamental nature. The dikduk of "מצות עשה לפרות ולרבות" rather than "מצוה לפרות ולרבות" emphasizes the action of procreation as the core of the chiyuv. The repetition of the verse in different contexts (creation, post-flood, Yaakov's blessing) suggests a persistent and overarching divine imperative.

Further, the Arukh HaShulchan delineates the minimum fulfillment:

"וכמה שיעור מצוה זו? בן ובת. שנאמר 'ומלאו את הארץ', ולא נאמר 'ומלאוה' – משמע שצריך שימלאוה אחרים ממנו, היינו זכר ונקבה שמהם מתרבים." – Arukh HaShulchan, Orach Chaim 247:2$^3$

Here, the Arukh HaShulchan explicates the halacha that Pru U'Rvu requires a son and a daughter, deriving it from the plural form "ומלאו" (and they shall fill) rather than "ומלאוהו" (and he shall fill it). This linguistic nuance, attributed to Beit Hillel in Yevamot 61b$^4$, is crucial. The plural "ומלאו" implies a perpetuation that requires both genders to establish a new generative unit, thereby actualizing the milui ha'aretz. The phrasing "שמהם מתרבים" (from whom they multiply) underscores that the mitzvah is not merely about having children, but about establishing a lineage capable of self-perpetuation.

Readings

The Arukh HaShulchan's exposition of Pru U'Rvu and Shevet synthesizes centuries of rabbinic discourse, clarifying distinctions and resolving tensions. We will examine the chiddushim of several Rishonim and Acharonim that underpin the Arukh HaShulchan's rulings, focusing on the definition of fulfillment, the role of women, and the nature of the mitzvot themselves.

Rambam: The Bifurcation of Pru U'Rvu and Shevet

The Rambam, in Hilchot Ishut 15:1-3, offers a foundational framework that distinctly separates Pru U'Rvu and Shevet, a distinction pivotal to the Arukh HaShulchan's analysis. The Rambam's chiddush lies in his precise articulation of two distinct mitzvot, each with its own source and minimum requirement. He states: "מצות עשה לפרות ולרבות, והיא מצוה ראשונה שנצטוו בה אדם הראשון ונוח... ואינה נוהגת אלא באנשים" (It is a positive commandment to be fruitful and multiply, and it is the first commandment given to Adam and Noah... and it applies only to men)$^5$. He then immediately defines its fulfillment: "אין אדם מקיים מצות פריה ורביה עד שיהיו לו בן ובת" (A person does not fulfill the commandment of Pru U'Rvu until he has a son and a daughter)$^6$. Critically, he then introduces Shevet: "אף על פי שיש לו בן ובת, הרי זה מצוה להוסיף ולפרות ולרבות, שכל המרבה בנפשות בישראל הרי זה מוסיף מצוה. ועוד אמרו חכמים, שאין העולם נכון אלא בפריה ורביה. וכן צוה ישעיה 'לא תהו בראה לשבת יצרה'" (Even if he has a son and a daughter, it is a mitzvah to add and be fruitful and multiply, for whoever increases souls in Israel adds to the mitzvah. And the Sages also said that the world is only properly settled through Pru U'Rvu. And thus Isaiah commanded, 'He did not create it for chaos, but for settlement')$^7$. The Rambam's chiddush is not merely stating there are two mitzvot, but defining their relationship. Pru U'Rvu is the initial chiyuv (obligation) with a specific minimum (son and daughter), while Shevet is an ongoing mitzvah of increasing population, which, though related, is conceptually distinct. The verse "לא תהו בראה לשבת יצרה" (Yeshayahu 45:18)$^8$ is brought as an independent source for Shevet, indicating that the mitzvah to settle the world exists even if one has fulfilled the minimum of Pru U'Rvu. This suggests a broader imperative: Pru U'Rvu is about establishing a reproductive unit, while Shevet is about populating and developing the world. The Arukh HaShulchan 247:3 echoes this, distinguishing the minimum "בן ובת" for Pru U'Rvu from the broader ideal of "להרבות בבנים ובנות" for Shevet, which can be fulfilled even with one child$^9$. The Rambam's clear delineation allows for scenarios where one fulfills one mitzvah but not the other, or where the chiyuv for one is met, but the other continues to apply.

Tosafot on Yevamot 61b: Delving into the Machloket of Fulfillment

The Arukh HaShulchan 247:2, in defining the minimum of Pru U'Rvu as a son and a daughter, explicitly sides with Beit Hillel against Beit Shammai and R. Yehoshua. The Gemara in Yevamot 61b presents this machloket: Beit Shammai hold two sons, R. Yehoshua holds a son and a daughter, and Beit Hillel holds a son and a daughter. The Gemara concludes that the halacha follows Beit Hillel$^10$. Tosafot, Yevamot 61b s.v. "בן ובת", offer a crucial chiddush by analyzing the underlying svara (reasoning) of this machloket, particularly Beit Hillel's position. They explain that the pasuk "ומלאו את הארץ" (Bereishit 1:28) implies the continuation of the human race. To "fill the earth" in a self-sustaining manner requires both genders, as a male-only or female-only lineage cannot perpetuate itself indefinitely. Tosafot highlight that the phrase "ומלאו את הארץ" is in the plural, implying future multiplication, which necessitates a pair capable of procreation$^11$. Beit Shammai, who require two sons, might interpret "ומלאו" as referring to the man's direct progeny who will themselves be able to fulfill Pru U'Rvu. Two sons would ensure the family line continues through males. R. Yehoshua, on the other hand, aligns with Beit Hillel, indicating that the svara of perpetuation through a male and female is compelling. The chiddush of Tosafot here lies in their emphasis on the purpose of the mitzvah – the long-term perpetuation and filling of the earth – as the determinant of its minimum fulfillment. It's not just about having children, but about establishing a reproductive unit. This nuanced understanding of "ומלאו את הארץ" provides the logical backbone for the consensus halacha adopted by the Arukh HaShulchan. It shifts the focus from merely having a certain number of children to creating a system for continued population growth.

Rashi on Yevamot 65b: The Nuance of Women's Exemption

The Arukh HaShulchan 247:6 states unequivocally that women are exempt from Pru U'Rvu$^12$. This fundamental halacha is rooted in the Gemara, Yevamot 65b$^13$. The Gemara offers several reasons for this exemption: "לא נאמר אלא לאיש" (it was said only to the man), "איש ולא אשה" (a man, but not a woman), and the concern of "שהיא מסוכנת בלידה" (that she is in danger in childbirth). Rashi, Yevamot 65b s.v. "לא נאמר אלא לאיש", provides a chiddush by clarifying the primary svara for the exemption. He explains that the original command to Adam in Bereishit 1:28, "פרו ורבו", was addressed to "הם" (them, referring to Adam and Chava). However, the Gemara's inference "לא נאמר אלא לאיש" is from a different context: the command given to Noah, "צא מן התיבה אתה ואשתך ובניך ובני נשותיך" (Go out of the ark, you and your wife and your sons and your sons' wives – Bereishit 8:16). Immediately following this, the verse states, "פרו ורבו ומלאו את הארץ" (Bereishit 9:1). Rashi points out that before the command to "פרו ורבו," the men (Noah and his sons) are separated from the women (their wives). Therefore, the subsequent command, even though seemingly plural, is interpreted by the Sages as primarily directed at the men, who are the active agents in bringing about procreation$^14$. Rashi's chiddush here is subtle but profound. It moves beyond a simple statement of exemption to reveal a textual basis in the dikduk of the pesukim themselves, interpreted through the lens of derash. While the danger of childbirth (מסוכן) is also mentioned, Rashi's primary explanation grounds the exemption in the very wording and context of the divine command, establishing that the chiyuv was never intrinsically placed upon the woman. This means it's not merely an exemption due to ones (circumstance beyond one's control) but a fundamental absence of chiyuv from the outset. This distinction is crucial, as it implies that even if childbirth were entirely safe, women would still be exempt based on the textual analysis. The Arukh HaShulchan's concise statement "נשים פטורות ממצות פריה ורביה" (247:6) is built upon this fundamental Rashi-esque understanding.

Bach on Tur Even HaEzer 1: The Ongoing Nature of Shevet

The Bach (R. Yoel Sirkis), in his commentary on the Tur, Even HaEzer 1, offers a crucial chiddush regarding the ongoing nature of the mitzvah of Shevet beyond the minimum fulfillment of Pru U'Rvu. The Arukh HaShulchan 247:3, following the Rambam and Shulchan Aruch, affirms that even after having a son and a daughter, it is a mitzvah gedolah to continue having children$^15$. The Bach delves into the qualitative difference between the initial chiyuv of Pru U'Rvu and this ongoing imperative. The Bach emphasizes that while Pru U'Rvu is a quantifiable chiyuv that can be fulfilled and thereby completed, Shevet (as derived from "לא תהו בראה לשבת יצרה") is a continuous, aspirational mitzvah to populate the world. His chiddush lies in explaining that Shevet is not merely an expansion of Pru U'Rvu, but a distinct mitzvah with a different character. Pru U'Rvu is a chiyuv gavra (an obligation on the person) to achieve a specific outcome, whereas Shevet is more akin to a chiyuv cheftza (an obligation to the world itself, or a societal imperative) to ensure the land is settled. The Bach explains that Shevet applies even if one already has children, and even if one has fulfilled the Pru U'Rvu requirement. He sees the pasuk from Yeshayahu as establishing an independent mitzvah to ensure the world is not "tohu" (chaos/void) but rather "lashevet" (for settlement). This implies that as long as there is potential for population growth, the mitzvah of Shevet persists. This contrasts with Pru U'Rvu, which, once a son and daughter are born, is technically fulfilled, allowing one to be patur (exempt) from further chiyuv in that specific mitzvah. The Bach's emphasis on the distinct and ongoing nature of Shevet provides a strong halachic basis for the minhag and ideal of having many children, transforming it from a mere pious custom into a continuation of a divine imperative. The Arukh HaShulchan's reference to "מצוה רבה" (a great mitzvah) for continued procreation after the minimum is a direct reflection of this Bachian understanding of Shevet.

Friction

A significant conceptual friction arises when considering the Arukh HaShulchan's discussion in OC 247:8 regarding the permissibility of marriage for a saris (eunuch) or an aylonit (barren woman):

"סריס ואילונית מותרים להנשא זה לזה, וכן סריס מותר לישא אשה כשרה, ואילונית מותרת לישא איש כשר... ובעל הסריס או האילונית, אם אין לו בנים, חייב לישא אשה אחרת ולקיים מצות פריה ורביה." – Arukh HaShulchan, Orach Chaim 247:8$^16$

This statement presents a profound challenge: If Pru U'Rvu is the "מצוה ראשונה שבתורה" (first commandment in the Torah) and is widely understood as the primary tachtlit (purpose) of marriage, how can a marriage where its fulfillment is inherently impossible be permissible, and moreover, a mitzvah? The kushya is intensified by the Arukh HaShulchan's explicit instruction that the fertile spouse must still fulfill Pru U'Rvu with another partner if they lack children, highlighting that the primary mitzvah remains unfulfilled in such a union. This suggests a tension between the ideal purpose of marriage and its halachic reality.

The Kushya: Is Pru U'Rvu the Sole Tachtlit of Marriage?

The Gemara in Yevamot 64a explicitly permits a saris and aylonit to marry, stating, "כדתניא, סריס ואילונית מותרים להנשא זה לזה"$^17$. This permission, codified in Shulchan Aruch, Even HaEzer 5:12$^18$, seems to contradict the very essence of kiddushin as a vehicle for Pru U'Rvu. If the Torah commands "פרו ורבו"$^19$ and this is the inaugural mitzvah for humanity, and the gemara in Kiddushin 29b-30a ties the chiyuv of marriage directly to Pru U'Rvu ("הואיל ואי אפשר בלא אשה")$^20$, then how can a union devoid of this capacity be sanctioned? The kushya can be framed as a chakira (conceptual inquiry): Is Pru U'Rvu a conditio sine qua non for the validity of kiddushin, or merely the primary purpose for which chiyuv kiddushin arises for a fertile man? If it were the former, such marriages would be pasul (invalid). Since they are kasher (valid), it implies that Pru U'Rvu is not the sole or even essential condition for the kinyan of marriage. The tension lies in reconciling the gemara's emphasis on Pru U'Rvu as the reason for marriage with its simultaneous permission for sarisim and ayloniyot to marry. What other tachtliot of marriage are so weighty as to permit these unions despite the inability to fulfill the "מצוה ראשונה"?

The Terutz: Marriage for Tikkun HaAdam and Shevet (Beyond Pru U'Rvu)

The most compelling terutz (resolution) posits that while Pru U'Rvu is indeed the primary purpose for which a chiyuv of marriage falls upon a fertile man, it is not the only purpose, nor is it a prerequisite for the validity or even the mitzvah aspect of kiddushin itself. This terutz draws upon a broader understanding of human nature and the societal function of marriage.

1. Tikkun HaAdam (Human Perfection/Completion) and Eizer K'Negdo

The Gemara in Yevamot 62b states, "כל אדם שאין לו אשה אינו אדם שלם" (Any man who has no wife is not a complete man), based on Bereishit 5:2, "זכר ונקבה בראם ויברך אותם ויקרא את שמם אדם" (Male and female He created them... and called their name Adam)$^21$. This suggests that marriage, beyond procreation, serves a purpose of personal completion and actualization. The Rishonim, such as Rabbeinu Yonah (commentary on Avot 2:16), elaborate on this, explaining that a man without a wife lacks an eizer k'negdo (a helper opposite him), a partner for emotional, spiritual, and social support. The kinyan of kiddushin facilitates the tikkun of the individual by providing companionship, preventing perishut (abstinence/solitude), and establishing a proper household. Even a saris or aylonit can benefit from this aspect of marriage, finding companionship, mutual support, and a structured home life. This tachtlit is independent of procreative ability.

2. Shevet (Settlement) as a Distinct Mitzvah

As discussed in the "Readings" section, the Rambam and Arukh HaShulchan clearly distinguish between Pru U'Rvu (son + daughter) and Shevet (settling the world, even with one child). Even if a saris or aylonit cannot fulfill Pru U'Rvu, they might still contribute to Shevet in a broader sense. While they cannot produce biological children, they can raise children (e.g., adopted children, though adoption does not fulfill Pru U'Rvu directly for the parents, it contributes to the general shevet ha'aretz). More importantly, their marriage itself contributes to the social stability and structure of the world, preventing tohu (chaos) in a societal sense. The mitzvah of "לשבת יצרה" (Yeshayahu 45:18)$^22$ implies a general imperative for human flourishing and order, which includes family units, even if not directly procreative.

3. Bitul Yichud and Prevention of Znut (Immorality)

Another terutz focuses on the pragmatic aspects of marriage. The Gemara (Kiddushin 29b) discusses the need for a man to marry to prevent hirhur aveira (sinful thoughts) and znut. Even if a saris cannot procreate, the act of marriage provides a framework for permissible intimacy and prevents illicit relationships. For an aylonit, while she can conceive, she cannot carry to term. Marriage still channels her natural desires within a halachically sanctioned framework. This terutz emphasizes the preventative and regulatory function of marriage, which is applicable regardless of fertility. The Arukh HaShulchan's allowance for a saris to marry a kasher woman, and vice-versa, indicates that the marital bond itself has inherent value beyond procreation.

In sum, the terutz is that Pru U'Rvu is indeed a singular, foundational chiyuv on men, prompting them to marry. However, marriage itself is a multi-faceted institution with several other tachtliot that remain operative even in the absence of procreative potential. These include the psychological and spiritual completion of the individual (tikkun ha'adam), the creation of a stable social unit (shevet in a broader sense), and the channeling of human drives within a holy framework (bitul yichud). The Arukh HaShulchan, by permitting these marriages while still obligating the fertile spouse to seek Pru U'Rvu elsewhere, subtly affirms this hierarchy: Pru U'Rvu is paramount, but not exclusive, in defining the mitzvah of marriage.

Intertext

The sugya of Pru U'Rvu and Shevet, as delineated by the Arukh HaShulchan, finds resonant parallels and cross-references in other areas of halacha and Jewish thought, particularly concerning the prioritization of mitzvot and the nuanced understanding of divine commands.

Prioritizing Limud Torah Over Pru U'Rvu (Kiddushin 29b-30a)

A classic intertextual discussion that directly engages with the primacy of Pru U'Rvu is the sugya in Kiddushin 29b-30a concerning the obligation of a man to marry and have children versus his obligation to study Torah. The Gemara presents a scenario where a man must choose between marrying and fulfilling Pru U'Rvu or continuing his intensive Torah study.

"תנו רבנן: מי שיש לו אשה ובנים ובא ללמוד תורה, רשאי. מי שאין לו אשה ובנים ובא ללמוד תורה, אינו רשאי. אמר רב יהודה אמר שמואל: הלכה כדברי אבא שאול, שאמר: מי שאין לו אשה ובנים ובא ללמוד תורה, רשאי, ובלבד שלא יבטל מפריה ורביה." – Kiddushin 29b-30a$^23$

The initial statement suggests that one must fulfill Pru U'Rvu before dedicating oneself fully to Torah study. However, Rav Yehuda in the name of Shmuel, citing Abba Shaul, rules that one is permitted to study Torah even if unmarried and childless, "ובלבד שלא יבטל מפריה ורביה" (provided he does not neglect Pru U'Rvu). This phrase "ובלבד שלא יבטל" is the crux of the chakira by Rishonim and Acharonim. Does it mean he must intend to fulfill it eventually, or that he must actively seek a wife while studying?

• Rambam (Hilchot Ishut 15:3) rules that if one is engaged in Torah study and fears that marrying will distract him, he may delay marriage, provided he does not neglect Pru U'Rvu entirely. He specifies that this permission is only for someone "תלמיד חכם העוסק בתורה" (a Torah scholar engaged in Torah)$^24$. This suggests a delicate balance where limud Torah, especially for a great scholar, can postpone but not abrogate the chiyuv of Pru U'Rvu.
• The Rosh (Kiddushin 1:44) interprets "שלא יבטל" to mean that he should not completely avoid marriage, but if he finds a suitable woman and marries, he can continue his studies. He notes that this leniency is specifically for those whose Torah study is so profound that it benefits the entire community. The Arukh HaShulchan's emphasis on Pru U'Rvu as "מצוה ראשונה" highlights its inherent importance. Yet, the sugya in Kiddushin provides a critical counterpoint: there are instances where another mitzvah can take precedence or at least allow for deferral. This intertext reveals that even the "first mitzvah" is not absolute in its immediate demand, and a hierarchy or balancing act among mitzvot exists. It informs our meta-psak heuristics by demonstrating that the chiyuv of Pru U'Rvu is not a monolithic imperative but interacts dynamically with other chiyuvim, particularly limud Torah, which is considered equal to all mitzvot (Peah 1:1)$^25$. The permission to delay Pru U'Rvu for Torah study suggests that the chiyuv is ultimately about the outcome (having children) rather than the timing of the marriage, as long as the intent to fulfill it remains.

Mitzvat Yishuv Eretz Yisrael (Settling the Land of Israel)

The mitzvah of Yishuv Eretz Yisrael (settling the Land of Israel) offers another compelling parallel to the sugya of Pru U'Rvu and Shevet, particularly regarding the idea of a continuous, overarching imperative for population and development. The Ramban, in his Hassagot to Sefer HaMitzvot (Mitzvat Aseh 4 of Rambam's omitted mitzvot), argues forcefully for Yishuv Eretz Yisrael as a positive mitzvah derived from Bamidbar 33:53, "והורשתם את הארץ וישבתם בה כי לכם נתתי את הארץ לרשת אותה" (You shall dispossess the inhabitants of the land and dwell in it, for to you I have given the land to possess it)$^26$. He maintains that this mitzvah is not merely about conquest, but about settlement and populating the land. The parallel emerges in several ways:

1. Continuous Nature: Like Shevet (as distinct from Pru U'Rvu), Yishuv Eretz Yisrael is often understood as a continuous mitzvah, not fulfilled by a single act but by ongoing presence and development. The Ramban emphasizes that the mitzvah persists "לדורות עולם" (for all generations). This mirrors the Arukh HaShulchan's point that even after fulfilling Pru U'Rvu, the mitzvah of Shevet continues, encouraging further procreation. Both mitzvot aim at populating a specific domain – the world in general for Shevet, and Eretz Yisrael specifically for Yishuv Eretz Yisrael.
2. Societal Imperative: Both Shevet and Yishuv Eretz Yisrael carry a strong societal dimension. They are not merely chiyuvim gavra (individual obligations) but contribute to the collective good and the divine plan for humanity and Am Yisrael. The Arukh HaShulchan's emphasis on "ומלאו את הארץ" for Pru U'Rvu and "לשבת יצרה" for Shevet resonates with the idea that human existence is divinely purposed for settlement and flourishing.
3. Conflict with Other Mitzvot: Just as Pru U'Rvu can conflict with limud Torah, Yishuv Eretz Yisrael can conflict with other mitzvot or personal needs (e.g., financial stability, family considerations in the diaspora). Poskim debate the extent to which one is obligated to leave a comfortable situation in the diaspora to settle in Israel. The complexity of these debates mirrors the careful balance required when weighing the "מצוה ראשונה" of Pru U'Rvu against other compelling chiyuvim.

These intertexts reveal that the principles underlying Pru U'Rvu and Shevet – the balance between individual chiyuv and societal good, the distinction between minimum fulfillment and ongoing aspiration, and the dynamic interaction among mitzvot – are not isolated to this sugya but are foundational to Jewish legal and ethical thought.

Psak/Practice

The Arukh HaShulchan's systematic treatment of Pru U'Rvu and Shevet in OC 247:1-8 provides the bedrock for contemporary halachic practice, influencing decisions from personal life choices to broader communal norms.

The Ongoing Obligation and Minhag

The primary psak that lands in practice is the halacha that one fulfills Pru U'Rvu with a son and a daughter, as stated in 247:2. However, the Arukh HaShulchan's emphasis in 247:3 on the mitzvah gedolah to continue having children – rooted in the mitzvah of Shevet – translates into a strong minhag (custom) and societal expectation within observant communities. While technically one is patur from the chiyuv of Pru U'Rvu after a son and daughter, the ideal of having many children is widely embraced. This is not merely a stringency but a practical manifestation of the Rambam's and Bach's understanding of Shevet as an ongoing imperative, ensuring the "לא תוהו בראה לשבת יצרה." Many poskim view having more children as fulfilling a mitzvah rabbah or a chiyuv of Shevet, even if not the specific Pru U'Rvu.

Women's Exemption and Family Planning

The explicit exemption of women from Pru U'Rvu (247:6) is a critical practical point. This means that a woman is not individually obligated to bear children. While a woman is typically considered to be fulfilling a mitzvah by enabling her husband to perform Pru U'Rvu, her personal chiyuv is not to procreate. This has significant implications for family planning decisions. For example, while poskim generally discourage birth control for men who have not fulfilled Pru U'Rvu, women have more leniency in certain circumstances, especially if there are health concerns or if they have already had children and fulfilled Pru U'Rvu through their husband. However, even with the exemption, most poskim would still encourage women to participate in Pru U'Rvu due to the general importance of the mitzvah and the tachtlit of marriage. The Arukh HaShulchan's discussion in 247:7 regarding a woman's potential obligation in Shevet (which he leans against)$^27$ further underscores that her primary role is not under the same chiyuv as a man's in this regard.

Meta-Psak Heuristics: Balancing Tachtlit and Kinyan

The discussion surrounding sarisim and ayloniyot (247:8) is crucial for meta-psak heuristics. It establishes that while a mitzvah may have a primary tachtlit (e.g., Pru U'Rvu for marriage), the kinyan (legal act) or institution itself can possess inherent value and other valid purposes. Marriage for tikkun ha'adam, companionship, or prevention of znut remains valid and meritorious, even when the primary tachtlit of procreation cannot be met. This principle is applicable in other areas of halacha where the ideal fulfillment of a mitzvah might be unattainable, yet a partial or alternative fulfillment, or the underlying institution, retains its validity and significance. This nuanced approach allows halacha to accommodate complex human realities without compromising the importance of core mitzvot. For instance, it provides a framework for understanding the validity of kiddushin in modern contexts where fertility issues are prevalent, affirming the sanctity of the marital bond even in the absence of biological progeny.

Takeaway

The Arukh HaShulchan elucidates Pru U'Rvu as the seminal mitzvah of establishing a self-perpetuating family unit (son and daughter), distinct from Shevet, the enduring imperative to populate and settle the world. This distinction allows for a flexible halachic framework that prioritizes procreation while recognizing the multi-faceted purposes of marriage and the dynamic interplay between different mitzvot.

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Footnotes:

1. Arukh HaShulchan, Orach Chaim 247:1.
2. Bereishit 1:28; Bereishit 9:1; Bereishit 35:11.
3. Arukh HaShulchan, Orach Chaim 247:2.
4. Yevamot 61b.
5. Rambam, Hilchot Ishut 15:1.
6. Rambam, Hilchot Ishut 15:2.
7. Rambam, Hilchot Ishut 15:3.
8. Yeshayahu 45:18.
9. Arukh HaShulchan, Orach Chaim 247:3.
10. Yevamot 61b.
11. Tosafot, Yevamot 61b s.v. "בן ובת".
12. Arukh HaShulchan, Orach Chaim 247:6.
13. Yevamot 65b.
14. Rashi, Yevamot 65b s.v. "לא נאמר אלא לאיש".
15. Arukh HaShulchan, Orach Chaim 247:3.
16. Arukh HaShulchan, Orach Chaim 247:8.
17. Yevamot 64a.
18. Shulchan Aruch, Even HaEzer 5:12.
19. Bereishit 1:28.
20. Kiddushin 29b.
21. Yevamot 62b; Bereishit 5:2.
22. Yeshayahu 45:18.
23. Kiddushin 29b-30a.
24. Rambam, Hilchot Ishut 15:3.
25. Peah 1:1.
26. Ramban, Hasagot al Sefer HaMitzvot, Mitzvat Aseh 4 (Shelo Mana); Bamidbar 33:53.
27. Arukh HaShulchan, Orach Chaim 247:7.