According to Rabbinic Judaism, the oral Torah, oral Law, or oral tradition (Hebrew: תורה שבעל פה, Torah she-be-`al peh) is the oral tradition received in conjunction with the written Torah (and the rest of the Hebrew Bible), which is known in this context as the "written Torah" (Hebrew: תורה שבכתב, Torah she-bi-khtav). The Mishnah is the record of the oral Torah.
According to Rabbinic Judaism, Moses and the Israelites received an oral as well as the written Torah ("teaching") from God at Mount Sinai. The books of the Tanakh (Hebrew Bible) were relayed with an oral tradition passed on by the scholarly and other religious leaders of each generation, and according to classical Rabbinic interpretation, the teachings of the oral law are a guide to that interpretation of the written law which is considered the authoritative reading. Jewish law and tradition thus is not based on a strictly literal reading of the Tanakh, but on combined oral and written traditions. Further, the basis of halakha (Jewish law) is the premise that the written law is inherently bound together with an oral law.
The "oral law" was ultimately recorded in the Mishnah, the Talmud and Midrash.
The laws transmitted to Moses were contained in the Torah written down on scrolls. The explanation however, was not allowed to be written down. Jews were obligated to speak the explanation and pass it on orally to students, children, and fellow adults. It was thus initially forbidden to write and publish the Oral Law: written material would be incomplete and subject to misinterpretation (and abuse).
After great debate, however, this restriction was lifted. Following the destruction of the Second Temple and the fall of Jerusalem, it became apparent that the Palestine community and its learning were threatened, and that publication was the only way to ensure that the law could be preserved.
