《国语·晋语·里克杀奚齐而秦立惠公》
秦君有的是郡县土地，我再奉上黄河以西的五座城邑，这不是因为秦君没有，而是为秦君东游到黄河的桥梁之上时，就不再会有什么为难着急的事了。
君实有郡县，且入河外列城五。岂谓君无有，亦为君之东游津梁之上，无有难急也。
The king of Qin has enough county land. I will present five cities west of the Yellow River. This is not because the king of Qin does not have them, but because when the king of Qin goes east to the bridge of the Yellow River, he will no longer have any trouble or worry.