《太平广记·卷十七·神仙十七》
然而，他们经过十几年的修炼内功，采集仙药，历尽了辛苦艰难，手、脚都磨起了老茧，却仍然什么也没得到。
辛勤采练，手足胼胝，十数年间。
However, they spent more than a decade practicing their internal energy and collecting the elixir, and they went through a lot of hard work and hardships. Their hands and feet developed calluses, but they still did not obtain anything.