Plato, Laws 774a

θεῷ ὑπηρέτας ἀνθʼ αὑτοῦ παραδιδόναι. πάντα οὖν ταῦτα καὶ ἔτι πλείω τις ἂν εἴποι περὶ γάμων, ὡς χρὴ γαμεῖν, προοιμιαζόμενος ὀρθῶς· ἂν δʼ ἄρα τις μὴ πείθηται ἑκών, ἀλλότριον δὲ αὑτὸν καὶ ἀκοινώνητον ἐν τῇ πόλει ἔχῃ καὶ ἄγαμος ὢν γένηται πεντεκαιτριακοντούτης, ζημιούσθω κατʼ ἐνιαυτὸν ἕκαστον, ὁ μέγιστον μὲν τίμημα κεκτημένος ἑκατὸν δραχμαῖς, ὁ δὲ τὸ δεύτερον ἑβδομήκοντα, τρίτον δὲ ἑξήκοντα, ὁ δὲ τὸ τέταρτον τριάκοντα. τοῦτο δʼ ἔστω τῆς Ἥρας

All this and more one might say in a proper prelude concerning marriage and the duty of marrying. Should any man, however, refuse to obey willingly, and keep himself aloof and unpartnered in the State, and reach the age of thirty-five unmarried, an annual fine shall be imposed upon him, of a hundred drachmae if he be of the highest property-class, if of the second, seventy, if of the third, sixty, if of the fourth, thirty.