Jewish tradition maintains that the history of Judaism begins with the Covenant between God and Abraham (c. 1800 BCE), the patriarch and progenitor of the Jewish people. According to the traditional Jewish belief, God also created another covenant with the Israelites (the ancestors of the Jewish people), and revealed his laws and commandments (Mitzvot) to them on Mount Sinai in the form of the Written Torah. Traditional Judaism also maintains that an Oral Torah was revealed at the same time and, after being passed down verbally for generations, was later transcribed in the Talmud. Laws, traditions, and learned Rabbis who interpret these texts and their numerous commentaries comprise the modern authority on Jewish tradition. While each Jew's level of observance varies greatly, the traditional practice of Judaism revolves around the study and observance of God's Mitzvot.