《太平广记·卷一百一十八·报应十》
到最后三年，厅前的皂荚树开花，应当是调任改官北归了，以后再就没有写什么了。韦丹平常象宝贝一样带着它。
最后年迁江西观察使，至御史大夫，到后三年，厅前皂荚树花开，当有迁改北归矣，其后遂无所言。
In the last three years, when a soapberry tree in front of the hall blossomed, he would be reassigned to the north. After that, nothing more was written. Weidan carried this scroll with him as if it were a precious treasure.