《梁书·列传·卷四十九》
所以诗》有六义，其中第一叫兴，第二叫赋，第三叫比。
故《诗》有六义焉，一曰兴，二曰比，三曰赋。
Therefore, in poetry, there are six principles: the first is "xing" (allusion), the second is "fu" (description), and the third is "bi" (comparison).