The Fable of the Snake

A snake lived at the door of the hut and bit the baby who lived in the hut. The baby was injured and died. The parents were very sad, and the father decided to kill the snake to avenge his child. The next day, when the snake came out of the cave looking for food, he raised his axe and chopped down at the snake's head, but because he chopped it too fast, he didn't chop off the snake's head and only its tail. From then on, I was afraid that the snake would come to avenge again, so I lived in fear every day. The snake reprimanded and said: "I and you can no longer coexist peacefully, because when I see you, I will think of my lost tail." And his father also said: "I will remember when I meet you. Up my dead son."

Moral-when is the injustice reported?