It should be the story of Alibaba and the forty thieves.

This story takes place in the medieval Arab Empire: Alibaba, a poor and destitute woodcutter, accidentally discovered the treasure of a robber group on his way to chop wood. He easily obtained a large amount of wealth, but he did not take it all for himself. However, good intentions are not rewarded, and the robbers conspired to kill Alibaba to eliminate future troubles. Alibaba was helped by the smart, witty, and hateful maid Margina, and then he turned danger into safety and defeated the robbers. He also let his nephew marry Margina, the maid who helped him three times. The language of the work is easy to understand, and the plot is tortuous and wonderful, which vividly expresses people's yearning and pursuit for a better life. It also tells us from the side that we should be an upright person who knows how to repay kindness.