淨土五會念佛誦經觀行儀卷中．下 2.4

2.4

爾時佛告長老舍利弗。從是西方。過十萬億佛土。有世界。名曰極樂。其土有佛。號阿彌陀。今現在說法。舍利弗。彼土何故名為極樂。其國眾生無有眾苦。但受諸樂。故名極樂。

At that time, the Buddha addressed the Elder Śāriputra: "From here to the west, past hundreds of thousands of koṭis of Buddha-lands, there is a world named Sukhāvatī. In that land there is a Buddha named Amitābha, who is currently teaching the Dharma. Śāriputra, why is that land named Sukhāvatī? The sentient beings of that land experience none of the multitudes of suffering, but receive only all kinds of bliss; therefore it is named Sukhāvatī.