《资治通鉴·汉纪·汉纪五十八》
张松的哥哥、广汉郡太守张肃知道张松的密谋后，恐怕祸事会连累自己，就告发了张松的阴谋。
松兄广汉太宗肃，恐祸及己，因发其谋。
Zhang Song's older brother, Hanchang's Grand Administrator, Zhang Su, learned of Zhang Song's secret plot.  He was worried that the calamity would implicate him, so he exposed Zhang Song's plot.