χελῶναι μακάριαι τοῦ δέρματος → you tortoises are fortunate in your skin, you blessed turtles with your shell
(see also ἐξοτρύνω): incite, cheer on, urge on
excitare, to arouse, excite, 1.84.2, [vulgo commonly ἐποτρυνόντων] 1.90.1.
