《淮南子·说山训》
所以破毁的房屋下面坐不得，倾斜将倒的墙边站不得。执掌牢狱的人不易得病，已判死刑的人反而养得肥胖红润，接受宫刑的人长寿，这是因为到了此时他们反而没了任何杂念和情欲的拖累了。
执狱牢者无病，罪当死者肥泽，刑者多寿，心无累也。
So, don't sit under a crumbling house and don't stand next to a wall that is tilting and about to collapse. People in charge of jails do not often get sick, while prisoners sentenced to death grow fat and rosy, and people who have been castrated live longer. This is because at that point, they no longer have any worries or desires holding them back. 