Statement to his son, as quoted in Familiar Quotations 9th Edition (1894) edited by J. Bartlett, p. 723 http://books.google.com/books?id=pus-AAAAYAAJ&pg=PA723
Originally quoted in Plutarch, Themistocles http://www.perseus.tufts.edu/hopper/text?doc=Perseus%3Atext%3A2008.01.0074%3Achapter%3D18%3Asection%3D5 (18.5): (5) Of his son, who lorded it over his mother, and through her over himself, he said, jestingly, that the boy was the most powerful of all the Hellenes; for the Hellenes were commanded by the Athenians, the Athenians by himself, himself by the boy's mother, and the mother by her boy. (Bernadotte Perrin, Ed., via Perseus Project)
Original Greek http://www.perseus.tufts.edu/hopper/text?doc=Perseus%3Atext%3A2008.01.0074%3Achapter%3D18%3Asection%3D5: "(5) ποῦ ἂν ἦτε νῦν ὑμεῖς;’ τὸν δὲ υἱὸν ἐντρυφῶντα τῇ μητρὶ καὶ δι᾽ ἐκείνην αὐτῷ σκώπτων ἔλεγε πλεῖστον τῶν Ἑλλήνων δύνασθαι: τοῖς μὲν γὰρ Ἕλλησιν ἐπιτάττειν Ἀθηναίους, Ἀθηναίοις δ᾽ αὐτόν, αὐτῷ δὲ τὴν ἐκείνου μητέρα, τῇ μητρὶ δ᾽ ἐκεῖνον."
