《太平广记·卷三百九十五·雷三》
霹雳一声巨雷响过，无畏顿时变成一头牛，腹部有红色字迹写道： 负心人史无畏。 
霹雳一震，无畏遽变为牛，朱书腹下云： 负心人史无畏。 
There was a loud thunderclap, and Wuwei suddenly turned into a cow, with red characters written on his abdomen: The unfeeling historian Wuwei.