Plato, Laws 929d

ὑὸν ποιήσασθαι, τοὺς τῶν ἐπιγόνων ἐπιμελητὰς τῶν εἰς τὴν ἀποικίαν ἐπιμελεῖσθαι καὶ τούτων, ὅπως ἂν μετάσχωσι τῆς αὐτῆς ἀποικίας ἐμμελῶς. ἐὰν δέ τίς τινα νόσος ἢ γῆρας ἢ καὶ τρόπων χαλεπότης ἢ καὶ σύμπαντα ταῦτα ἔκφρονα ἀπεργάζηται διαφερόντως τῶν πολλῶν, καὶ λανθάνῃ τοὺς ἄλλους πλὴν τῶν συνδιαιτωμένων, οἰκοφθορῇ δὲ ὡς ὢν τῶν αὑτοῦ κύριος, ὁ δὲ ὑὸς ἀπορῇ καὶ ὀκνῇ τὴν τῆς παρανοίας

then the controllers of the surplus children designed for emigration shall take control of these persons also, in order that they may be duly included in the same scheme of emigration. And if a man becomes unusually demented owing to illness or old age or crabbedness, or a combination of these complaints, but his condition remains unnoticed by all except those who are living with him, and if he regards himself as master of his own property and wastes his goods, while his son feels at a loss and scruples to indict him for insanity,—in such a case a law shall be enacted