The headword phrase occurs in a short list of similarly paradoxical ones (including cowardly lion and wingless bird) in Maximus of Tyre, Lectures 11.5.e6; cf. Lexicon Vindobonense alpha32
1Same glossing, according to Adler, in the Ambrosian Lexicon. The more usual adjective is a)ke/ratos.↩
2See e.g. Plato, Politicus 265B; Aelian, De natura animalium 2.53.