《战国策·魏三·芒卯谓秦王》
芒卯就去了秦国，对秦王说： 魏国之所以献出长羊、王屋、洛林的土地，是有意想依靠大王的军队向东进攻齐国。
乃之秦，谓秦王曰： 魏之所以献长羊、王屋、洛林之地者，有意欲以下大王之兵东击齐也。
Mang Mao went to the State of Qin and said to Kind Qin: The reason why Wei donated the land of Chang Yin, Wang Wu and Luo Lin, was to rely on the troops of Your Majesty to attack Qi in the East.