《太平广记·卷七十六·方士一》
术士看到李相公后，十分惊讶，对禄山说： 我刚听见传报相公到来，便有两名青衣女子手捧香炉先走进门来，接着是仆射侍卫，个个铜头铁臂，都能穿屋越墙而行。
惊曰： 吾初见报相公来，有双鬟二青衣，捧香炉先入，仆射侍卫铜头铁额之类。皆穿屋逾垣而走。
When the sorcerer saw Minister Li, he was very surprised and said to Lushan: When I heard the news that the minister was coming, two young women in green robes came in first with incense burners. Then came the guards of the servants, each with a copper head and iron arms. They could walk through the house and over the wall.