"Odysseus…
The king told me he’d hosted the man in style,
befriended him on his way home to native land,
and showed me all the treasure Odysseus had amassed.
Bronze and gold and plenty of hard wrought iron,
enough to last a man and ten generations of his heirs –
so great the wealth stored up for him in the king’s vaults!
But Odysseus, he made clear, was off at Dodona then
to hear the will of Zeus that rustles forth
from the god’s tall leafy oak: how should he return,
after all the years away, to his own green land of Ithaca –
openly or in secret? Phidon swore to me, what’s more,
as the princely man poured out libations in his house,
‘The ship’s hauled down and the crew set to sail,
to take Odysseus home to native land.’"

– Homer

The Odyssey, Book 14, 370-374. The tale that Odysseus-the-beggar tells Eumaeus is entirely fictitious, except this one prediction – that Odysseus will be sailing home to his native Ithaca with great treasure. Dodona is the ancient sanctuary of the god Zeus.