《太平广记·卷一百七十一·精察一》
第二天，有苍蝇聚集在尸体的头顶，严遵命令拨开头发查看，发现有一铁锥插在死者的头顶。
更日，有蝇聚头所。遵令披视，銕锥贯顶。
The next day, flies gathered on the body's head. Yan Zun ordered to remove the hair. An iron nail was found stabbed into the head of the dead man.