《战国策·东周·秦攻宜阳》
赵累回答说： 攻打宜阳的秦将甘茂是寄居秦国的客将，如果他攻下宜阳就有功，相当于秦国的周公旦；如果不成功，就会被秦国被革除官职。
对曰： 甘茂羁旅也，攻宜阳而有功，则周公旦也；无功，则削迹于秦。
Zhao Lei said: Gan Mao, the Qin general who attacked Yiyang, was a guest general living in Qin. If he captured Yiyang, he would be considered to have done a great service, equivalent to Duke of Zhou of Qin; if he was not successful, he would be dismissed from his official position in Qin.