《史记·三十世家·齐太公世家》
屈完说： 您合于正义才能胜利；如果不然，楚国就以方城山为城墙，以长江、汉江为护城河，您如何能攻进来呢？ 
屈完曰： 君以道则可；若不，则楚方城以为城，江、汉以为沟，君安能进乎？ 
Qu Wan said: You can only win if you are just; otherwise, the state of Chu will have Fangcheng Mountain as its city wall, and the Yangtze River and Han River as its moat, how can you attack it?