Plato, Laws 828a

τούτων μὴν ἐχόμενά ἐστιν τάξασθαι μὲν καὶ νομοθετήσασθαι ἑορτὰς μετὰ τῶν ἐκ Δελφῶν μαντειῶν, αἵτινες θυσίαι καὶ θεοῖς οἷστισιν ἄμεινον καὶ λῷον θυούσῃ τῇ πόλει γίγνοιντʼ ἄν· πότε δὲ καὶ πόσαι τὸν ἀριθμόν, σχεδὸν ἴσως ἡμέτερον ἂν νομοθετεῖν ἔνιά γʼ αὐτῶν εἴη. τάχʼ ἂν τὸν ἀριθμόν. τὸν ἀριθμὸν δὴ λέγωμεν πρῶτον· ἔστωσαν γὰρ τῶν

Our next task is, with the help of the Delphic oracles, to arrange and ordain by law the festivals, prescribing what sacrifices, and to what deities, it will be good and right for the State to offer: the times and the number of them, however, it is, no doubt, our own business to ordain by ourselves. Very likely, as regards the number of them. Then let us first state the number. There shall be