《资治通鉴·汉纪·汉纪三十七》
如今，幸而有度辽营的大军在北疆扬威镇守，即便我们不派使者回报北匈奴，他们也不敢作乱。 
今幸有度辽之众扬威北垂，虽勿报答，不敢为患。 
Fortunately, there is now a standing army in Duliao that is imposing and defensively guarding the northern border, and even if we do not send an envoy to report back to the Northern Xiongnu, it would not dare to cause trouble.