It is a massive work structured around the notion of the Tree of Life with three trunks, each with three branches, each loaded with fruit. He quotes extensively from patristic sources and other Biblical commentaries, notably those of Ibn al-Ṭayyib.[1] An autograph copy of this is preserved in the Bibliothèque nationale de France in Paris. It is dated to anno mundi 984, which corresponds to anno Domini 1268.