/u/Fjccsbraga

There are two accounts of Jan Hus' last words as he was burned at the stake.

The one due to Poggius "the Papist" says (translated into English),

At that moment, one of the electors, Prince Ludwig of the Palatinate, rode up and pleaded with Hus to recant, so that he might be spared a death in the flames. But Hus replied: “Today you will roast a lean goose, but hundred years from now you will hear a swan sing, whom you will leave unroasted and no trap or net will catch him for you.” Full of pity and filled with much admiration, the Prince turned away.

And the other one due to Foxe (translated into English),

When the fagots were piled up to his very neck, the duke of Bavaria was so officious as to desire him to abjure. “No, (said Huss;) I never preached any doctrine of an evil tendency; and what I taught with my lips I now seal with my blood.” He then said to the executioner, “You are now going to burn a goose, (Huss signifying goose in the Bohemian language:) but in a century you will have a swan which you can neither roast nor boil."

The note above is important, because "Hus" does mean "Goose" in the Czech language that is his native language. And further, Hus was known to be an eloquent orator and gifted conversationalist. So that statement was indeed made, but whether it was a prophecy may forever be debated.

Luther himself was aware of this symbolism, as he was often compared to Hus. That's why we see many paintings of Luther with a Swan. Some say that Luther's family crest featured a Swan, thus further supporting the belief that Hus made a prophecy. But I find it hard to believe that his family would have an aristocratic coat of arms. Luther himself likened himself into a swan, symbolically linking himself to Hus.

For information on Hus, read McCullaugh's The Reformation.