《新唐书·列传·卷一百四十四》
奚，也是东胡种，被匈奴打败后退守乌丸山，汉时曹操曾斩杀手下帅将蹋顿，就是奚的后代。
奚，亦东胡种，为匈奴所破，保乌丸山。汉曹操斩其帅蹋顿，盖其后也。
The Xi were also a branch of the Donghu, who retreated to Wu Wan Shan after being defeated by the Xiongnu. In the Han Dynasty, Cao Cao killed their leader, Taton, which was the origin of the Xi.