《左传·成公·成公二年》
等到楚共王即位，将要发动阳桥战役，派巫臣到齐国聘问，同时把出兵的日期告诉齐国。
及共王即位，将为阳桥之役，使屈巫聘于齐，且告师期，巫臣尽室以行。
When King Gong of Chu came to the throne, and was about to move into battle at Yang Qiao, he sent Wu Chen to Qi to make a formal offer of marriage, and also to inform Qi of his date for sending troops.