Histories

The thief trusted the king and came before him; Rhampsinitus was very admiring and gave him his daughter to marry on the grounds that he was the cleverest of men; for as the Egyptians (he said) surpassed all others in craft, so he surpassed the Egyptians.

They said that later this king went down alive to what the Greeks call Hades and there played dice with Demeter, and after winning some and losing some, came back with a gift from her of a golden hand towel.

From the descent of Rhampsinitus, when he came back, they said that the Egyptians celebrate a festival, which I know that they celebrate to this day, but whether this is why they celebrate, I cannot say.