《左传·成公·成公十六年》
诸侯的军队驻扎在郑国西部，我国的军队驻扎在督扬，不敢经过郑国。
诸侯之师次于郑西。我师次于督扬，不敢过郑。
The allied troops were stationed on the western side of the state of Zheng while our troops stayed in Duyang and did not dare to go through Zheng.