《明史·列传·卷一百六十六》
邦彦又给张家玉写信说 ：桂林眼下势如累卵，只要我们能牵制清兵不往西去，使浔州、平乐得以保全，就可以说是我们在这边使劲，在那边看见成功了。 
且遣张家玉书曰： 桂林累卵，但得牵制毋西，浔、平间可完葺，是我致力于此而收功于彼也。 
Bangyan wrote another letter to Zhang Jiayu saying: The situation in Guilin is now like walking on eggshells, as long as we can restrict the Qing forces from going west, so that Xunzhou and Pingle can be preserved, it can be said that we exert our strength on this side and see success on that side. 