《史记·七十列传·万石张叔列传》
景帝说： 剑是人们所喜爱之物，往往用来送人或交换他物，难道你能保存到现在吗？ 卫绾说： 全都还在。 
上曰： 剑，人之所施易，独至今乎？ 绾曰： 具在。 
Emperor Jing said, "Swords are things that people love. They are often used to give to others or to exchange for other things. How could you have kept them until now?" Wei Wan said, "They are all still here." 