Mishneh Torah, Forbidden Intercourse 12-14

Sugya Map

• Core Issue: The scope and source of the prohibition against intermarriage between a Jew and a non-Jew.
• Nafka Mina(s):
  • Does the prohibition ("You shall not intermarry") apply only to the seven Canaanite nations (Tur) or to all gentiles (Rambam)?
  • Is the prohibition Scriptural or Rabbinic?
  • Does a "marriage" exist between a Jew and a non-Jew (Kiddushin), or is it merely licentious relations (Bi'ah)?
• Primary Sources:
  • Deuteronomy 7:3 ("You shall not intermarry").
  • Ezra/Nehemiah 10:31 (The post-exilic oath).
  • Avodah Zarah 36b (The Hasmonean decree).
  • Kiddushin 68b (R' Shimon vs. Sages on ta'ama d'kra).

Text Snapshot

• MT, Forbidden Intercourse 12:1: "When a Jew engages in relations with a woman from other nations, [taking her] as his spouse... they are punished by lashes, according to Scriptural Law."
  • Nuance: Rambam uses the term ishut (spouse/marital state). Note the dikduk: he links the prohibition directly to the act of formalizing a union. Even if the state does not recognize the union as a Kiddushin (which is null and void), the act of establishing an ishut triggers the malkot.
• MT, Forbidden Intercourse 12:4: "When, by contrast, one engages in relations with a gentile woman with a licentious intent, he is given 'stripes for rebellious conduct' according to Rabbinic Law."
  • Nuance: The shift from Scriptural lashes to makkot mardut reflects the Rambam’s taxonomy of "marriage" versus "promiscuity."

Readings

The Rambam (Halachic Universalism)

Rambam (12:1) asserts that the prohibition of intermarriage applies to all gentiles. He relies on Kiddushin 68b, where R' Shimon interprets the phrase "For he shall sway your son away" (ki yasir) not merely as the reason for the prohibition against the seven nations, but as a generative principle extending the prohibition to any gentile who might cause a Jew to turn from God. Rambam’s chiddush is the elevation of a ta'ama d'kra (reasoning of a verse) into a formal, binding prohibition that encompasses all humanity.

The Tur (Contextualism)

The Tur (Even HaEzer 16) takes a restrictive approach, arguing that the Torah’s verse refers strictly to the seven Canaanite nations. For the Tur, the prohibition against other gentiles is either Rabbinic or non-existent in the sense of a formal "intermarriage" prohibition, because, as he famously posits, ein kiddushin l'goi—there is no such thing as a valid marital bond between a Jew and a non-Jew. Therefore, the Torah’s restriction on "giving your daughter" is a specific legislative act regarding the Canaanites, while other unions are governed by the general prohibition of bi'ah (promiscuous relations) rather than the specific prohibition of chatanut (intermarriage).

Friction

The Kushya: The strongest challenge to Rambam comes from the Tosafot (Kiddushin 68b), who argue that if the prohibition against intermarriage applies to all gentiles, why does the Torah explicitly single out the seven nations? If we follow R' Shimon’s logic—that the reason for the law defines the law—we effectively nullify the legislative boundaries set by the literal text. Furthermore, if ein kiddushin l'goi, how can one be "married" to a gentile in any sense that triggers the malkot of chatanut?

The Terutz: Rambam’s approach is a meta-halachic expansion. As the Sha'ar HaMelech notes, Rambam interprets the Talmudic conclusion that "when the reason is stated explicitly in the text, we do derive the law from the reason." Because the Torah explicitly states "for he shall sway your son," this creates a legislative mandate that overrides the narrow literalism of the Tur. The "marriage" here is not an ontological Kiddushin (which requires kiddushei kesef), but a functional status of ishut—a lived reality of partnership that the Torah treats as a violation of the prohibition against "intermarrying," regardless of whether the Kiddushin is valid in the eyes of Heaven.

Intertext

• Malachi 2:11: "Judah has desecrated the holiness of God... and has married the daughter of a foreign god." The Rambam uses this to ground the severity of the act in the Prophets, showing that the prohibition isn't just about the Canaanite period, but about the ongoing existential threat of spiritual assimilation.
• SA, Even HaEzer 16:1: The Shulchan Aruch reflects the tension between these views, often leaning toward the stringency of the Rambam in practice, while acknowledging the technical difficulties raised by the Rishonim regarding the status of the "marriage."

Psak/Practice

The psak is absolute: intermarriage is forbidden. However, the heuristic matters. Rambam views the prohibition as an essential safeguard against the "swaying of the heart," making it a cornerstone of Jewish identity. In modern practice, we treat the union as invalid (ein kiddushin), meaning no Get is required, but the prohibition of the union (the bi'ah or the ishut state) remains a grave violation. The meta-psak is that the Torah’s boundaries are not just about formal definitions, but about the preservation of the "holy seed" and the prevention of the dilution of the covenant.

Takeaway

Rambam’s rigor transforms the prohibition of intermarriage from a tribal boundary into a universal theological principle: any union that "sways the heart" from the covenant is, for all practical purposes, a violation of the sanctity of the Jewish people.