E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Without discrimination or judgment. Midas, King of Phrygia, was appointed to judge a musical contest between Apollo and Pan, and gave judgment in favour of the satyr; whereupon Apollo in contempt gave the king a pair of asss ears. Midas hid them under his Phrygian cap; but his servant, who used to cut his hair, discovered them, and was so tickled at the joke, which he durst not mention, that he dug a hole in the earth, and relieved his mind by whispering in it Midas has asss ears. Budæus gives a different version. He says that Midas kept spies to tell him everything that transpired throughout his kingdom, and the proverb that kings have long arms was changed in his case to Midas has long ears. Ex eo in proverbium venit, quod multos otacustasi.e. auricularios habebat. (De Asse.) (See Pope: Prologues to Satires.)
Domenichino (15811661) has a painting on the Judgment of Midas.
Midas has asss ears. An exact parallel of this tale is told of Portzmach, king of a part of Brittany. It is said Portzmach had all the barbers of his kingdom put to death, lest they should announce to the public that he had the ears of a horse. An intimate friend was found willing to shave him, after swearing profound secrecy; but not able to contain himself, he confided his secret to the sands of a river bank. The reeds of this river were used for pan-pipes and hautbois, which repeated the words PortzmachKing Portzmach has horses ears.