Thus have I heard:
One time, the Budha was staying at Anaathapindidas Ashrama in Jetavana of Shraavastii.
At that time, Budha said to the bhikshus, “There are two people whose kindness can never be fully repaid, no matter how much good one does for them. Who are these two?
They are one’s parents. Suppose, bhikshus, someone were to carry their father on their left shoulder and their mother on their right shoulder for a million years, providing them with clothing, food, bedding, and medicine, and even allowing them to relieve themselves on their shoulders—still, they could not repay their parents’ kindness.
Bhikshus, you should know that the kindness of parents is profound. They nurture, raise, and protect you at all times, ensuring you grow and see the light of day. Through this example, understand how difficult it is to repay their kindness. Therefore, bhikshus, you should always serve and honour your parents, being filial and attentive without fail. Thus, bhikshus, you should train yourselves.”
When the bhikshus heard what the Budha said, they followed it with joy.