This proverb describes something that cannot be stopped or helped. It is said that this proverb comes from the people. In ancient times, there was a little official named Lu Yu in a county in the south of the Yangtze River, who was a dutiful son. Once I was ordered to escort food and grass, and before I left, I knelt before my parents to say goodbye: "Heaven (the emperor) wants Lu Yu, and food needs relief, but my son is helpless. I don't know if it's good or bad, I hope my parents take care. " Later, the old father died of illness, and the old mother was lonely and helpless. She begged for her son along the way, muttering, "What about Lu Yu and food?" Later, I learned that my son was beheaded because he delayed the date of rations. The old mother was desperate and drowned. Whenever people talk about the tragedy of the Lujia family, they often end up with "Heaven wants Lu Yu and the land wants food". Later, these eight words were misinformed as "it will rain, and mother will marry", which has been passed down to this day. (2) It is said that there was a scholar named Zhu Yaozong in ancient times. He took the exam in Beijing, was among the best in high school and was recruited as Ma Xu. Before returning home, he asked the emperor to build a chastity memorial arch for his widowed mother, and the emperor allowed him to play. After returning home, he told his mother about the chastity memorial archway, but her mother didn't agree, saying that she wanted to remarry with his mentor Zhang Wenju. Zhu Yaozong knelt down and begged his mother not to remarry. Mother took off Luo's skirt, told him to wash it, and said that if the skirt dried the next day, she promised not to marry; If you don't do it, it is life. On this day, the sky was clear, but that night, it was cloudy and raining heavily, and the skirt was always wet. Mother said to her son, "It's going to rain, and mother is going to get married. Heaven forbid! " "Later, Zhu Yaozong told the emperor about it and was pardoned. The phrase "it's going to rain, mom is going to get married" has been handed down.