During the Buddha’s time, there was a woman who was in extreme misery after the death of her only child.
When she asked the Buddha to revive her son, he said, “Go and find a household which have never known death and ask for some kusha grass for your son, and he will be revived.”
With hope in her heart, she set off in search of the grass, going from door to door, but was unsuccessful. For which family has never lost someone?
Finally, she understood that with birth, there must be death. Death does not only occur to one person or in one family, it is a common phenomenon. With this, she came out of her futile mourning.