淨土論 2.43

2.43

四如一切經中彌陀佛偈云：唯念法藏比丘，乃從世饒王發願，喻諸佛誓二十四章。世世見諸佛，姟數無有量，不廢宿命行，功德遂具成。世界名清淨，得佛號無量。

Fourth, as the verses on Amitābha Buddha in an 'All-Sūtras' text say: 'Be mindful only of the monk Dharmākara, who then made vows before Lokeśvararāja, taking the vows of all buddhas as his model in twenty-four chapters. In life after life he saw buddhas, countless tens of billions; without neglecting his past practices, his virtues were finally fulfilled. His realm is named Purity, and as a buddha he is named Immeasurable.