《新唐书·列传·卷一百四十八》
有个术士名杜元纪，望见李义府的宅第有狱气。还说： 拿出二千万积储来，可以压住狱气。 
会术者杜元纪望义府第有狱气，曰： 发积钱二千万，可以厌胜。 
There was a warlock named Du Yuanji. He saw that there was a felonious evil spirit in Li Yifu’s mansion. He also said, “You can take out 20 million to suppress this evil spirit.”