《新唐书·列传·卷十四》
后来作为李靖的副手规取突厥，条奏突厥可取之状于太宗说： 颉利放纵嗜欲肆其凶暴，诛害善良之士，亲近奸邪小人，君主昏庸于上，这是头一条可攻之处。
后副李靖经略突厥，条可取状于帝曰： 颉利纵欲肆凶，诛害善良，昵近小人，此主昏于上，可取一也。
Later, he served as Li Jing's deputy to attack the Turks, and presented a memorial to Emperor Taizong on the Turks' capture. He said: "Jie Li indulged in pleasure and indulged in his brutality, killing good people and approaching treacherous men. The emperor was昏庸 at the top, which is the first place to attack. "