《南史·本纪·卷六》
当时王肃独自攻城，第一次击鼓就退了回来，刘昶有了疑心，武帝于是又给他写信，造成他们之间的矛盾。
时王肃自攻城，一鼓而退，刘昶有疑心，帝因与书，间成其隙。
At the time Wang Su attacked the city alone, he retreated after beating the drum for the first time, Liu Chang became suspicious, and the Martial Emperor then wrote to him, creating conflict between them.