Apophthegmata Laconica
Plutarch
Plutarch. Moralia, Vol. III. Babbitt, Frank Cole, editor. Cambridge, MA: Harvard University Press; London: William Heinemann Ltd., 1931 (printing).
πρὸς δὲ τὸν εἰπόντα, ὅτι ἐπαινοίη αὐτὸν καὶ ὑπερασπάζοιτο, δύο βοῦς ἔχω, ἔφη, ἐν ἀγρῷ·
σιγώντων δʼ ἀμφοτέρων, ἀκριβῶς ἐπίσταμαι τὸν τε ἀργὸν καὶ τὸν ἐργαζόμενον.