《左传·昭公·昭公七年》
过去我们先君共王伸着脖子向北望，每天每月都在盼望着贵国使者的到来，世代相传，到今天经历四位国王了。
嘉惠未至，唯襄公之辱临我丧。
In the past, our late ruler, King Gong, craned his neck to look north, and was looking forward to the arrival of your country’s envoy every day and every month. It has been passed down for generations, and continued until today after experiencing four kings.