《水经注·卷八》
又说：巫山在平阴东北，从前齐侯登山观望晋军，看到晋军这么多，心中害怕起来，就回去了。
又云，巫山在平阴东北，昔齐侯登望晋军，畏众而归。
It also said: Wushan is in the northeast of Pingyin. In the past, Duke Qi of Qi climbed the mountain to watch the Jin army. When he saw so many Jin troops, he was frightened and went back.