《史记·七十列传·黥布列传》
正当这时，秦军加紧围攻赵国，赵国屡次派人来请求救援。
当是时，秦急围赵，赵数使人请救。
At that time, the troops of the State of Qin were besieging the State of Zhao, and the State of Zhao repeatedly sent messengers to plea for help.