《三国志·吴书·周瑜鲁肃吕蒙传》
众将领都认为兵力不足不能再分派，吕蒙对周瑜、程普说： 留下凌公绩，我与您前往救急解围，按情势不会很久，我保证凌公绩能固守十天。 
诸将以兵少不足分，蒙谓瑜、普曰： 留凌公绩，蒙与君行，解围释急，势亦不久，蒙保公绩能十日守也。 
All of the generals thought that their troops were insufficient and could not be divided further. Lü Meng said to Zhou Yu and Cheng Pu: Leave Ling Gongji in command, and I will go with you to rescue and break the siege. According to the situation, it won't be long, and I guarantee that Ling Gongji will be able to hold out for ten days.