Plato, Laws 920d

ὅσα τις ἂν ὁμολογῶν συνθέσθαι μὴ ποιῇ κατὰ τὰς ὁμολογίας, πλὴν ὧν ἂν νόμοι ἀπείργωσιν ἢ ψήφισμα, ἤ τινος ὑπὸ ἀδίκου βιασθεὶς ἀνάγκης ὁμολογήσῃ, καὶ ἐὰν ἀπὸ τύχης ἀπροσδοκήτου τις ἄκων κωλυθῇ, δίκας εἶναι τῶν ἄλλων ἀτελοῦς ὁμολογίας ἐν ταῖς φυλετικαῖσιν δίκαις, ἐὰν ἐν διαιτηταῖς ἢ γείτοσιν ἔμπροσθεν μὴ δύνωνται διαλλάττεσθαι. Ἡφαίστου καὶ Ἀθηνᾶς ἱερὸν τὸ τῶν δημιουργῶν γένος, οἳ

Touching agreements, whenever a man undertakes and fails to fulfil his agreement—unless it be such as is forbidden by the laws or by a decree, or one made under forcible and unjust compulsion, or when the man is involuntarily prevented from fulfilling it owing to some unforeseen accident,—in all other cases of unfulfilled agreements, actions may be brought before the tribal courts, if the parties are unable to come to a previous settlement before arbitrators or neighbors. Sacred to Hephaestus and Athena is the class of craftsmen who have furnished our life with the arts,