《资治通鉴·汉纪·汉纪五十二》
及至天下大乱，荀对乡里父老说： 颖川地势平阔，四面受敌，应该尽早躲避。 
及天下乱，彧谓父老曰： 颍川四战之地，宜亟避之。 
When the world was in great chaos, Xun Gong said to the elders in his hometown: Yingchuan's terrain is flat and open, and it is vulnerable to attacks from all sides. We should avoid it as soon as possible.