A Biblical harmony is a hermeneutic method of analyzing parallel and often disparate accounts within the Bible in an attempt to resolve apparent conflicts and demonstrate its cohesive unity.
To him was due the reform introduced in the laws of incest ( 'arayot), he having been the first to protest against exaggerations of the scope of the hermeneutic rule of analogy (heḳesh) by which the successors of Anan had prohibited intermarriage between the most distant relatives.