Sounds like the story of Medea
“So she repaired to the palace of Pelias and persuaded his daughters to make mince meat of their father and boil him, promising to make him young again by her drugs; and to win their confidence she cut up a ram and made it into a lamb by boiling it. So they believed her, made mince meat of their father and boiled him. But Acastus buried his father with the help of the inhabitants of Iolcus, and he expelled Jason and Medea from Iolcus.“