Plato, Laws 904a

ἐκ πολλῶν ἕν, πρώτης ἢ δευτέρας ἢ καὶ τρίτης γενέσεως μετειληφότα πλήθεσιν ἄπειρʼ ἂν εἴη τῆς μετατιθεμένης κοσμήσεως· νῦν δʼ ἔστι θαυμαστὴ ῥᾳστώνη τῷ τοῦ παντὸς ἐπιμελουμένῳ. πῶς αὖ λέγεις; ὧδε. ἐπειδὴ κατεῖδεν ἡμῶν ὁ βασιλεὺς ἐμψύχους οὔσας τὰς πράξεις ἁπάσας καὶ πολλὴν μὲν ἀρετὴν ἐν αὐταῖς οὖσαν, πολλὴν δὲ κακίαν, ἀνώλεθρον δὲ ὂν γενόμενον, ἀλλʼ οὐκ αἰώνιον, ψυχὴν καὶ σῶμα, καθάπερ οἱ κατὰ νόμον ὄντες

then when things had shared in a first, or second, or even third generation, they would be countless in number in such a system of transformations; but as things are, the task before the Supervisor of the All is wondrous easy. How do you mean? Thus:—Since our King saw that all actions involve soul, and contain much good and much evil, and that body and soul are, when generated, indestructible but not eternal, as are the gods ordained by law (for if either soul or body had been destroyed,