《百战奇略·第二卷·威战》
于是，就斩了使者的仆人、砍断车子左边的车辕、杀了左边驾车的马匹，并向全军示众。
乃杀其仆、车之左驸、马之左骖，以徇三军。
So, he had the envoy's servant beheaded, the left-hand yoke of the carriage chopped off and the left-hand draught horse killed, and made an example of this to the entire army.