《史记·七十列传·孟尝君列传》
苏代替西周对孟尝君说： 您拿齐国的兵力帮助韩国、魏国攻打楚国达九年之久，取得了宛、叶以北的地方，结果使韩、魏两国强大起来，如今再去攻打秦国就会越加增强了韩、魏的力量。
苏代为西周谓曰： 君以齐为韩、魏攻楚九年，取宛、叶以北以彊韩、魏，今复攻秦以益之。
Su replaced Western Zhou to say to Lord Mengchang: you brought the military force of the State of Qi to help the State of Han and the State of Wei fight against the State of Chu for nine years, obtaining the lands to the north of Wan and Ye, which made the States of Han and Wei more powerful, at this time, if you attack the State of Qin again, you will make the States of Han and Wei even stronger.