Page "Judaism" Paragraph 61

According to Rabbinic tradition, all valid interpretations of the written Torah were revealed to Moses at Sinai in oral form, and handed down from teacher to pupil ( The oral revelation is in effect coextensive with the Talmud itself ).

When different rabbis forwarded conflicting interpretations, they sometimes appealed to hermeneutic principles to legitimize their arguments ; some rabbis claim that these principles were themselves revealed by God to Moses at Sinai.