The Warring States Period in China

The husband gave the male sword to his wife and told her, the king of Trull won't let me live. Buried this sword under a tree and give it to our son when he is grown. A decade or so later, a young man came into the capital of the state of Trull that was the son of the sword making couple. He succeeded in killing the king who had killed his father, but he died too. And after that, no one has seen those swords anywhere. They lived on only in legends.