反哺之私

Explanation: Feed: chicks grow up, the title of food to feed his mother. Analogy children support their elderly parents grew up, repay upbringing. 　　Source: Jin Chenggong Sui "Wu Fu": "child not only strong but can fly Come, is the title of food and feed." 　　Examples: We have ~, support for the elderly is the bounden duty. Thesaurus:  parents love can hardly be reciprocated by their children, spring scenery