"During the time of the Commander of the Faithful (as), some children were playing with their arrows. One of them shot his arrow and broke his companion's front tooth. The matter was brought to the Commander of the Faithful (as). The shooter presented evidence that he had warned by saying, 'Be careful!' So, the Commander of the Faithful (as) dismissed the retribution (qisas) from him and then said: 'The one who gives a warning has fulfilled his responsibility.'"