無量壽經連義述文贊 2.218

2.218

經曰「波揚無量」至「歡喜無量」者，述云：第二、歎聲。有三：此初、隨類異聞也。

Regarding the sūtra saying from “the waves stir up immeasurable” down to “immeasurable joy,” the commentary states: Second, praise of the sounds. There are three points: this first is hearing different sounds according to category.