《水经注·卷四十》
到了建业，孙权就要烹煮它，但烧了万车柴火，乌龟却毫无影响。
既至建业，权将煮之，烧柴万车，龟犹如故。
When Sun Quan arrived at Jianye, he wanted to cook the turtle, but after burning ten thousand cartloads of firewood, the turtle hadn't even been singed.