《淮南子·人间训》
鲁国有个人到齐国去为他父亲报仇，他将仇人杀死以后，剖腹挖心，然后坐下端正帽子，又站起更换了血衣，缓步走出仇家大门，登上马车以后让马夫慢慢驱赶马走，脸上的神色一点不变。
鲁人有为父报仇于齐者，刳其腹而见其心，坐而正冠，起而更衣，徐行而出门，上车而步马，颜色不变。
A man from the State of Lu went to the State of Qi to avenge his father. After killing his enemy, he cut open his stomach and took out his heart. Then he sat down and straightened his hat, stood up and changed his blood-stained clothes, walked slowly out of the enemy's house, and got into a carriage. He then asked the coachman to drive the horses slowly, and his expression did not change at all.