《太平广记·卷一百七十四·俊辩二》
虞部员外郎顾云写了一篇悼念张琇的文章说：冒犯法律复仇，实在难逃刑法的追究，舍身忘死尽孝，符合仪礼周礼。
故虞部员外郎顾云诔之曰：冒法复仇，信难逃于刑典，忘身徇孝，诚有契于礼经。
Gu Yun, an assistant director of the Ministry of Personnel, wrote an article mourning Zhang Yu, saying: "Breaking the law to avenge his father is indeed difficult to escape the punishment of the criminal law, but sacrificing his life to fulfill his filial piety is in keeping with the ritual etiquette."