《战国策·齐三·国子曰秦破马服君之师》
安邑是魏国的都城；晋阳是赵国的都城；鄢郢是楚国的都城。本来三国和秦国接壤，如果秦国进攻魏国，就会夺取安邑，进攻赵国，就会夺取晋阳，进攻楚国，就会夺取鄢郢。
安邑者，魏之柱国也；晋阳者，赵之柱国也；鄢郢者，楚之柱国也。故三国欲与秦壤界，秦伐魏取安邑，伐赵取晋阳，伐楚取鄢郢矣。
Anyi is the capital of Wei, Jinyang is the capital of Zhao, and Yanying is the capital of Chu. Originally, the three states bordered Qin. If Qin attacks Wei, they will take Anyi. If they attack Zhao, they will take Jinyang. If they attack Chu, they will take Yanying.