《资治通鉴·晋纪·晋纪三十三》
拓跋认为郗恢没有遵奉君臣之间的礼法，让张衮和崔逞代写回信，一定要贬斥东晋的君主。
珪以恢无君臣之礼，命衮及逞为复书，必贬其主。
Tuoba thought Xi Hui was not conforming to the etiquette between ruler and minister, and asked Zhang Gun and Cui Cheng to write a letter in reply, to make sure to criticize the Eastern Jin Emperor.