《资治通鉴·周纪·周纪三》
秦王没有觉察，事后觉得此人相貌伟岸不凡，不像是臣子能有的风度，派人急忙去追赶他；而赵主父一行已经出了边关。
秦王不知，已而怪其状甚伟，非人臣之度，使人逐之，主父行已脱关矣。
The King of Qin did not notice, but afterwards felt that this person's appearance was extraordinary and uncommon, unlike any courtier he had ever seen, so he sent someone to chase after him; however, the Lord Father of Zhao and his party had already left the border.