《资治通鉴·周纪·周纪三》
先前中山国倚仗齐国的强兵，侵犯我们领土，掠夺人民，又引水围灌城，如果不是老天保佑，城几乎就失守了。此事先王深以为耻。
先时中山负齐之强兵，侵暴吾地，系累吾民，引水围鄗；微社稷之神灵，则鄗几于不守也，先君丑之。
Previously, Zhongshan relied on Qi’s military strength to invade our territory, plunder our people, and diverted water to flood the city. If not for the heavens’ protection, the city would have fallen. The previous king was deeply ashamed of this.