Idiom describing a son's love for his mother.

Meng Mu has moved three times, and her mother's love is like a mountain. Every grass and tree is spring. His parents are kind and diligent, and he misses them. In spring, nothing grows, quail lives in a miserable place, and he chooses his neighbor. He thought of the cold spring. He was puzzled by the heavens and the earth. The old calf suffered hardships. He was kinder than his mother.