《三国志·吴书·陆逊传》
陆抗说: 俞赞是我军中的老办事人员，知道我方虚实底细的人，我常担心夷兵素不精练，如果敌人围攻，必定先从夷兵防守处下手。 
抗曰： 赞军中旧吏，知吾虚实者，吾常虑夷兵素不简练，若敌攻围，必先此处。 
Lu Kang said: Yu Zan is a veteran in my army, who knows the details of my strengths and weaknesses. I am always worried that the Yi soldiers are not well-trained. If the enemy besieges, they will definitely start from the Yi soldiers' defense.