from Wiktionary, Creative Commons Attribution/Share-Alike License
- Prove what you can do, here and now.
The phrase arises from the Latin form of Aesop's Fables (Gibbs 209; Perry 33: Chambry 51), as translated from Ancient Greek "Αὐτοῦ γὰρ καὶ Ῥόδος καὶ πήδημα" (literally) "Here is Rhodes, jump here!". In the fable, a boastful athlete brags that he once achieved a stupendous long jump in competition on the island of Rhodes. A bystander challenges him to dispense with the reports of the witnesses and simply repeat his accomplishment on the spot: "Here is Rhodes, jump here!" (Wiktionary)