《战国策·秦五·文信侯欲攻赵以广河间》
甘罗辩解说： 古时项七岁时即为孔子师，我今年已十二岁了，君侯为何不让我去试一试，为何不由分说便呵斥于我呢！ 
甘罗曰： 夫项櫜生七岁而为孔子师，今臣生十二岁于兹矣，君其试臣，奚以遽言叱也? 
Gan Luo defended and said: "In ancient times, Xiang was seven years old when he became Confucius's teacher. I am already twelve years old this year. Why doesn't the king let me try it, why don't you just scold me!"