《徐霞客游记·游雁宕山日记》
接着就是高峰的尽头处，一座石壁如刀劈一般陡峭，我一向惧怕石片锋利逼人，而到这里已经是没有锋利的石片可以放置脚了！
既而高峰尽处，一石如劈，向惧石锋撩人，至是且无锋置足矣！
Then, at the end of the peak, a stone wall stood as steep as a knife cut. I was always afraid of sharp stone slabs, but here there were no sharp stone slabs to place my feet on!