《汉书·志·五行志中之上》
京房之《易传》说： 执政有失误，下面就会有人谋害作乱，出现的妖祥就是狗头长角。
京房《易传》曰： 执政失，下将害之，厥妖狗生角。
Jingfang's "Commentary on the Book of Changes" says: when the government makes a mistake, people below will plot sedition, and the strange omen is a dog's head with horns.