According to the Jewish tradition, the oral law was given to
Moses on Mount Sinai together with the written law. During the period of the Second Temple, the oral law was upheld by the Pharisees in opposition to the Sadducees. Eventually it was studied in
the academies, and was written
down in the Mishnah which was
compiled by Judah Ha-Nasi in the
second century. After centuries of discussion, the oral law was recorded in the
Talmud. After the redaction of
the Talmud in the sixth century, it was further studied in talmudic academies.
In the gaonic period, the Karaites rejected the authority of the
oral law. Modern non-Orthodox
Judaism rejects the belief that the oral law was revealed to Moses on Mount
Sinai; instead it is viewed as originating through discussion and
interpretation over the centuries.