Noahide Laws - Subdividing The Seven Laws

Subdividing The Seven Laws

Various rabbinic sources have different positions on the way the seven laws are to be subdivided in categories. Maimonides lists other additional Noahide commandments, including the coupling of different kinds of animals and the grafting of different species (as defined by Jewish law) of trees. Rabbi David ben Solomon ibn Abi Zimra (Radbaz), a contemporary commentator on Maimonides, expressed surprise that he left out castration and sorcery which were listed in the Talmud.

The 10th-century Rabbi Saadia Gaon added tithes and levirate marriage. The 11th-century Rav Nissim Gaon included "listening to God's Voice", "knowing God" and "serving God" besides going on to say that all religious acts which can be understood through human reasoning are obligatory upon Jew and Gentile alike. The 14th-century Rabbi Nissim ben Reuben Gerondi added the commandment of charity.

The 16th-century work Asarah Maamarot by Rabbi Menahem Azariah of Fano (Rema mi-Fano) enumerates thirty commandments, listing the latter twenty-three as extensions of the original seven, which includes prohibitions on various forms of sorcery, as well as incest and bestiality. Another commentator, Rabbi Zvi Hirsch Chajes (Kol Hidushei Maharitz Chayess I, end Ch. 10) suggests these are not related to the first seven, nor based on Scripture, but were passed down by oral tradition. The number thirty derives from the statement of the Talmudic sage Ulla in tractate Hullin 92a, though he lists only three other rules in addition to the original seven, consisting of details of the prohibitions against homosexuality and cannibalism, as well as the imperative to honor the Torah.

Talmud commentator Rashi remarks on this that he does not know the other Commandments that are referred to. Though the authorities seem to take it for granted that Ulla's thirty commandments included the original seven, an additional thirty laws is also possible from the reading.

The 10th century Shmuel ben Hophni Gaon lists thirty Noahide Commandments based on Ulla's Talmudic statement, though the text is problematic. He includes the prohibitions against suicide and false oaths, as well as the imperatives related to prayer, sacrifices and honoring one's parents.

The contemporary Rabbi Aaron Lichtenstein counts 66 instructions but Rabbi Harvey Falk has suggested that much work remains to be done in order to properly identify all of the Noahide Commandments, their divisions and subdivisions.

Theft, robbery and stealing covers the appropriate understanding of other persons, their property and their rights. The establishment of courts of justice promotes the value of the responsibility of a corporate society of people to enforce these laws and define these terms. The refusal to engage in unnecessary lust or cruelty demonstrates respect for the creation itself as renewed after the Flood. The prohibition against committing murder includes a prohibition against human sacrifice.

Maimonides, in his Mishnah Torah, interpreted the prohibition against homicide as including a prohibition against abortion.