《资治通鉴·宋纪·宋纪十》
源贺上书说： 如今，北方蛮虏不断进攻、骚扰，南方贼寇也时时对我们产生威胁，因此，我们的边疆一带，还必须要增加兵力，严加防守。
贺上言： 今北虏游魂，南寇负险，疆场之间，犹须防戍。
Yuan He wrote in a memorial: nowadays, the northern barbarians are constantly attacking and harassing, and the thieves from the south are also threatening us all the time. Therefore, our border areas must increase their military strength so that they can mount a stiff defense.