《左传·襄公·襄公二十六年》
秦国接受了楚国奉献的俘虏，却在郑国拿财物，不能说合于国家的体统，秦国不会这样做的。
受楚之功而取货于郑，不可谓国。秦不其然。
The State of Qin accepted the captives sent by the State of Chu, but in the State of Zheng they got the treasures. It cannot be said to fit the country's system. The State of Qin will not do this.