《魏书·列传·卷七十》
彭城王元勰很是为其文辞优美所嗟叹，想让王肃再吟，可是语出差错： 王公您吟咏情性，词语声律，都特别优美，是不是可以再吟一遍《悲彭城诗》。 
彭城王勰甚嗟其美，欲使肃更咏，乃失语云： 王公吟咏情性，声律殊佳，可更为诵《悲彭城》诗。 
King Pengcheng Yuanxie lamented deeply for the beauty of his words and wanted Wang Su to chant again, but there was a mispronunciation: Your Grace, you have expressed your emotions in rhyme, and the rhythm of the words are particularly beautiful, can you please chant the "Ode to Lament Pengcheng" again?