Plato, Euthydemus, Protagoras, Gorgias, Meno, Εὐθύδημος 355:

πάντων, ἔφη. ἦ καὶ μήτηρ ἡ μήτηρ; καὶ ἡ μήτηρ γε. καὶ τῶν ἐχίνων ἄρα, ἔφη, ἡ σὴ μήτηρ μήτηρ ἐστὶ τῶν θαλαττίων. καὶ ἡ σή γ’, ἔφη. καὶ σὺ ἄρα ἀδελφὸσ εἶ τῶν κωβιῶν καὶ κυναρίων καὶ χοιριδίων. καὶ γὰρ σύ, ἔφη. κάπροσ ἄρα σοι πατήρ ἐστι καὶ κύων. καὶ γὰρ σοί, ἔφη.