《晋书·志·第二章》
气像是雾又不是雾，衣冠不会被浸湿，一旦出现那个城邑就会迅速发生战事，黑色有的惊变，三天之内下雨就各自散开了。
气若雾非雾，衣冠不濡，见则其城带甲而趣。日出没时有雾气横截之，白者丧，乌者惊，三日内雨者各解。
The weather looks like fog but not fog, clothes will not be soaked, once it appears in that city, there will be a war quickly, the black color will be shocking, it will rain within three days and it will disperse by itself.