There is a canyon deep in the silent mountain. In the ravine, there lived mother rabbit, little grey rabbit and little black rabbit. Mother rabbit taught two baby rabbits: "Rabbits don't eat grass beside their nests, or hunters will come to them." Therefore, they don't eat grass near their nests. Later, when they grew up, the two rabbits left their mother and lived separately. The grey rabbit lives in the east of the ravine and the black rabbit lives in the west. After the two rabbits left their mother, the gray rabbit remembered her mother's advice. She doesn't eat grass near her nest. She goes far away to find grass to eat every day. The black rabbit is getting lazy, thinking that since there is grass to eat next to his nest, why go further and further? I eat grass next to my nest every day. Finally, one day, the hunter came to this ravine, and both rabbits hid in their nests. Because the black rabbit ate the grass beside his nest, the hunter found the black rabbit's nest at a glance and caught the black rabbit. The grey rabbit's nest was not found by hunters because of the cover of weeds, so it escaped. Although the rabbit is a typical herbivore, it doesn't eat grass beside its nest. The grass beside the nest is used for hiding. If you eat it, won't you be exposed to the enemy and lead to your own destruction? It can be seen that protecting the living environment means protecting yourself. The meaning that rabbits don't eat grass beside their nests: The surface layer means that rabbits don't eat grass beside their nests. Later, people quoted this sentence as an extension of "being good to your neighbors."

Telling people not to do bad things at home is also a metaphor for bad people not to do bad things in the local area.