Pythagorika Hypomnemata

Alexander Polyhistor (1st century BC) preserved a set of "Pythagorean Memoirs" or "Commentaries" (Pythagorika Hypomnemata) within his work

Successions of Philosophers, which [Diogenes Laertius (8.25–33) largely reproduces. These memoirs, reflecting an eclectic, late Pythagoreanism influenced by Stoicism, contain a blend of doctrines, mystical precepts (symbola), and cosmological theories regarding the soul and number as principles of existence

Chapter 7 - The eclectic Pythagoreanism of Alexander Polyhistor