集諸經禮懺儀 2.29

2.29

問曰：何故號為阿彌陀？答曰：《彌陀經》及《觀經》云：彼佛光明無量，照十方國無所障礙，唯覓念佛眾生攝取不捨，故名阿彌陀佛。彼佛壽命及其人民無量無邊阿僧祇劫，故名阿彌陀。

Question: Why is he named Amitābha? Answer: The Amitābha Sūtra and the Contemplation Sūtra say: That Buddha's light is immeasurable, illuminating the lands of the ten directions without hindrance, searching only for sentient beings mindful of the Buddha to embrace them and not abandon them; hence he is named Amitābha Buddha. That Buddha's lifespan and that of his people last for immeasurable, boundless asaṃkhyeya kalpas; hence he is named Amitābha.