《魏书·列传·卷二十三》
太宗决心南伐，责问崔浩说： 刘裕趁姚兴死而灭掉他的国家，我趁刘裕死征伐宋国，为什么不可以? 
太宗锐意南伐，诘浩曰： 刘裕因姚兴死而灭其国，裕死我伐之，何为不可？ 
Taizong (Wei Xiaowen Emperor) was determined to conquer the south. He asked Cui Hao: Liu Yu took advantage of Yao Xing's death to destroy his country; why can't I take advantage of Liu Yu's death to conquer the Song Dynasty?