or Caldron, to boil the old into youth again. Medea, the sorceress, cut an old ram to pieces, and, throwing the pieces into her caldron, the old ram came forth a young lamb. The daughters of Pelias thought to restore their father to youth in the same way; but Medea refused to utter the magic words, and the old man ceased to live.
“Get the Medea's kettle and be boiled a new.” —Congreve. Love for Love, iv.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894