Ἀρκάδας μιμούμενοι

[sc. A proverb] in reference to those who labor for others. For the Arcadians, though they had become the most warlike of Greeks, conquered no one on their own but many when fighting with others. Plato used this proverb in Peisandros:¹ for since poverty compelled him to provide for others comedies he had composed himself, he said that he was "imitating Arcadians".²
So [the noun is declined] *)arka/s, *)arka/dos, *)arka/di.