 As the oral law is in reality the interpretation of the Pentateuch, Weiss thinks that it originated immediately after the redaction of the latter by Moses.The apparent divergencies in the Pentateuch and the various books of the Prophets (as the well-known differences between the books of Ezekiel and Leviticus, and many others) are due only to different interpretations of the Pentateuch in different epochs.It will be seen that Weiss defended the unity of the Pentateuch and vindicated the authorship of Moses.