This work was a brief commentary on selected passages covering the whole Bible, as is shown in the fragments preserved by Oecumenius and in the Latin version of the commentary on the Catholic Epistles made at the instance of Cassiodorus.
The Pythagorean tradition considered the "founder" of their order to have studied with Zoroaster in Chaldea (Porphyry Life of Pythagoras 12, Alexander Polyhistor apud Clement's Stromata I.15, Diodorus of Eritrea, Aristoxenus apud Hippolitus VI32.2).