《魏书·列传·卷十八》
刘尼害怕他有变，暗中把情况告诉了殿中尚书源贺，源贺这时与刘尼都统领军队警卫皇宫。
尼惧其有变，密以状告殿中尚书源贺，贺时与尼俱典兵宿卫。
Liu Ni was afraid that he (Sai Ai) would make trouble, so he secretly told the fact to the Minister of the Imperial Palace Yuan He, who at that time commanded the troops to guard the imperial palace jointly with Liu Ni.