《资治通鉴·周纪·周纪五》
那些国家对秦国的怨恨已经积蓄很久了。秦国虽然在长平一战大获全胜，但自己士兵也死亡过半，国内空虚，再长途跋涉去远攻别人的国都，这时如果赵国在内抵抗，各国在外围进攻，秦军必然打败。 
彼诸侯怨秦之日久矣，秦虽胜于长平，士卒死者过半，国内空，远绝河山而争人国都，赵应其内，诸侯攻其外，破秦军必矣。 
Those countries had harbored resentments against the state of Qin for a long time. Although the state of Qin had won a great victory in the Battle of Changping, more than half of its soldiers had been killed. The country was weak. If it traveled a long distance to attack other countries' capitals, the Qin army would be defeated if the state of Zhao resisted internally and other countries attacked from the outside.