《资治通鉴·汉纪·汉纪四十二》
现在不推广朝廷的恩德，而吝惜屯戍的费用，这样下去，北匈奴就会气焰高涨，这难道是保护边疆安全的长久策略吗！ 
今不廓开朝廷之德而拘屯戍之费，若此，北虏遂炽，岂安边久长之策哉！ 
Now we do not promote the court's kindness, but are stingy with the expenses for garrisoning. If this continues, the Northern Huns’ arrogance will rise. Is this a long-term strategy to protect the safety of the border?