"But one part’s off the mark, I know – you’ll never persuade me –
what you say about Odysseus. A man in your condition,
who are you, I ask you, to lie for no good reason?
Well I know the truth of my good lord’s return,
how the gods detested him, with a vengeance –
never letting him go under, fighting Trojans,
or die in the arms of loved ones."

– Homer

The Odyssey, Book 14, lines 411-417. It is ironic that Eumaeus doesn’t believe the one thing that’s true in Odysseus-the-beggar’s concocted tale – that Odysseus will return to Ithaca. He accuses the beggar of lying about this.