《宋书·本纪·卷五》
二十日，索虏侵犯汝南各郡，陈、南顿二郡太守郑琨，汝阳颍川二郡太守郭道隐弃城逃走。
辛巳，索虏寇汝南诸郡，陈南顿二郡太守郑琨、汝阳颍川二郡太守郭道隐委守走。
On the 20th day, the Southern Barbarians invaded the various commanderies of Runan. The governor of Chen and Nandun, Zheng Kun, and the governor of Ruyi and Yingchuan, Guo Daoyin, abandoned their cities and fled.