《宋史·列传·卷一百二十八》
前进则面临高山，后退又背负长江，有百害无一利，在这种情况下他们还敢于横冲直闯，是因为前面没有抗拒，后面没有袭击追逐。
进则距山，退则背江，百无一利，而敢如此横行者，以前无抗拒，后无袭逐也。
If they advance, they will face high mountains, and if they retreat, their backs will be to the Yangtze River, with no benefit but a hundred harms, and they dare to charge forward in such circumstances because there is no resistance in front and no attack or pursuit behind.