《太平广记·卷二百三十八·诡诈》
后来，并州文水县有人在山谷中得到一块石头，也是这样，上面有武兴两个字。于是改文水为武兴县。
后并州文水县于谷中得一石，还如此，有武兴字，改文水为武兴县。
Later, someone in Wenshui County, Bingzhou, obtained a stone in a valley, which was also like this, with the characters "Wuxing" on it. So Wenshui was changed to Wuxing County.