觀無量壽佛經義疏 3.248

3.248

"The Buddha addressed Ānanda: ‘This sūtra is named Contemplation of the Land of Utmost Bliss, the Buddha Amitāyus, the Bodhisattva Avalokiteśvara, and the Bodhisattva Mahāsthāmaprāpta.’" It comprehensively encompasses circumstantial and direct [retributions], omitting only the retinue. The title at the beginning avoids verbosity, taking only five characters, yet its coverage is also complete. Second, naming it with reference to its efficacy.