《庄子·杂篇·则阳》
掘墓穴之深达到数时，得到一个石造的棺椁，洗去泥土后看它，上面有铭文说： 不必依赖子孙，灵公可以取去而居在这里。 
掘之数仞，得石槨焉，洗而视之，有铭焉，曰： 不冯其子，灵公夺而里之。 
When the burial site was dug to a certain depth, they found a stone coffin, after cleaning it of mud and inspecting it, they saw that it had an inscription that said: it is not necessary to depend on descendants, Ling gong can take it and stay here.