《容斋随笔·卷十一·何进高叡》
从这里可以知道，背上肋下的毒疮，不能不及早割除；猛兽掉入陷阱，养着它就会使自身遭受伤害。
乃知背胁瘭疽，决之不可不速；虎狼在阱，养之则自贻害。
From this we can learn that a boil on the back or under the rib should be cut off in time, and a beast falling into a trap will hurt itself if it is kept.