《三国志·吴书·陆逊传》
吕蒙说: 关羽素来勇猛，本就难以与他匹敌，而且他又占据荆州，对当地广施恩信，再加上他刚立下大功，胆量和威势愈加盛壮，不容易图取他。 
蒙曰： 羽素勇猛，既难为敌，且已据荆州，恩信大行，兼始有功，胆势益盛，未易图也。 
Lu Meng said: Guan Yu has always been brave and it is difficult to compete with him. In addition, he occupies Jingzhou, shows great kindness to the local people, and has just made great achievements. His courage and power are even more powerful, so it is not easy to capture him.