《北史·列传·卷二十九》
两军刚刚接触，杨玄感令人故意大声呼喊 ：官军已经抓住杨玄感了。 
兵始合，玄感诈令人大呼曰： 官军已得玄感矣。 
As soon as the two armies came into contact, Yang Xuangan ordered his men to shout loudly on purpose: "The imperial army has captured Yang Xuangan.