《太平广记·卷三十五·神仙三十五》
韦公任江西观察使，到郡二年，忽然有一天，有一个老头对守门人说： 你进去告诉韦公，就说黑老来了。 
韦公官江西观察使，到郡二年，忽一日，有一叟谓阍人曰： 尔报公，可道黑老来也。 
Mr Wei was appointed observational envoy to Jiangxi and stayed there for two years. One day, a little old man said to the doorkeeper: "Go in and tell Mr Wei that Blacky has come."