《资治通鉴·汉纪·汉纪三十一》
刘秀说： 王郎已经消灭，黄河以北略微平定，还用兵干什么？ 
萧王曰： 王郎已破，河北略平，复用兵何为？ 
Liu Xiu said: "Wang Lang has already been eliminated, and the area north of the Yellow River has been somewhat pacified. What use do we have for troops?"