Plutarch, Quaestiones Convivales, book 8, Πῶσ Πλάτων ἔλεγε τὸν θεὸν ἀεὶ γεωμετρεῖν. 16:

ἐπὶ τούτοισ ῥηθεῖσιν ἠξίουν κἀμὲ συμβαλέσθαι τι πρὸσ τὸν λόγον αὐτοῖσ. ἐγὼ δὲ τὰσ μὲν εἰρημένασ δόξασ ὡσ ἰθαγενεῖσ καὶ ἰδίασ αὐτῶν ἐκείνων ἐπῄνεσα καὶ τὸ εἰκὸσ ἔφην ἔχειν ἱκανῶσ·