τῆς δ' ἀρετῆς ἱδρῶτα θεοὶ προπάροιθεν ἔθηκαν ἀθάνατοι (Hesiod, Works and Days 289) → But between us and Goodness the gods have placed the sweat of our brows
στίγμα, πρόστριμμα, μύσος, ῥύμμα, παλαγμός, κηλίς, σπίλος, σπῖλος