《左传·昭公·昭公四年》
秋季，七月，楚灵王带领诸侯进攻吴国，宋国太子佐、郑简公先行回国。
秋七月，楚子以诸侯伐吴。宋大子、郑伯先归。
In the autumn of July, King Ling of Chu led some vassals to attack the State of Wu, and the Crown Prince of Song, Zuo, and the Gong of Zheng, Jian, returned to their countries in advance.