無量壽經連義述文贊 2.79

2.79

經曰「幸佛信明」至「力精所欲」者，述云：第二、請佛作證。有二：此初、請世王佛證願不虛也。幸者願也，信者誠也，願佛誠明，所求不虛，必得果故。所欲者，功德法身、快樂淨土，於彼二果力勵精勤而修習，故云於彼力精。

On the passage where the sūtra states, "May the Buddha faithfully understand..." up to "strive vigorously for what I desire": The commentary states: The second part is requesting the Buddha to bear witness. There are two parts: this is the first, requesting King Lokeśvara Buddha to bear witness that the vow is not in vain. Xing means "hope"; xin means "sincerity." May the Buddha with sincerity and clarity [witness that] what is sought is not in vain, and that the fruit will surely be attained. "What I desire" refers to the dharmakāya of virtues and the joyful pure land; one strives vigorously to cultivate toward those two fruits, hence it says "strive vigorously therein."