《资治通鉴·唐纪·唐纪二十六》
孙说： 薛讷任边镇守将达二十余年之久，竟然不能为国家收复营州。
佺曰：薛讷在边积年，竟不能为国家复营州。
Sun said: Xue Ne has been the garrison commander of the border town for more than twenty years, and has not been able to recover Yingzhou for the country.