This article introduces a Buddhist Sutra about the deep kindness of mothers and ways of repaying mothers' kindness. The Sutra has been used to teach children about mothers' kindness and the obligation to repay to their mothers in their old age. It contains discourses about 10 types of kindness that a mother bestows on her child and how to repay the kindness in her old age. The paper discusses the profound nature of mothers' kindness, the way of repaying the kindness, the reciprocal caring relationship between the mother and the child, the status of mothers in Buddhism, and implications for aging.