《宋书·本纪·卷一》
到这时担恺还京，产担假称刀伤发作，不能徒步随从，就和无忌同船一起回京，订下复兴晋国的计策。
至是桓修还京，高祖托以金创疾动，不堪步从，乃与无忌同船共还，建兴复之计。
At this time, Dun Kai returned to the capital. Dun Dun pretended to be suffering from a knife wound and was unable to walk with him. He returned to the capital with Wuji on the same boat and made a plan to revive the Jin Dynasty.