無量壽經優婆提舍願生偈註 1.65

1.65

此二句名莊嚴大眾功德成就。佛本何故起此莊嚴？見有如來說法輪下所有大眾諸根性欲種種不同，於佛智慧若退若沒，以不等故眾不純淨。所以興願：願我成佛，所有天人皆從如來智慧清淨海生。海者，言佛一切種智深廣無涯，不宿二乘、雜善、中下死屍，喻之如海。是故言天人不動眾，清淨智海生。不動者，言彼天人成就大乘根，不可傾動也。

These two lines are called the accomplishment of the adornment of merits of the great assembly. Why did the Buddha originally raise this adornment? He saw that under the wheel of a Tathāgata expounding the Dharma, all the faculties, natures, and desires of the great assembly are various and different; regarding the Buddha's wisdom, they may retrogress or sink, and because they are not equal, the assembly is not purely clean. Therefore he made the vow: "I vow that when I attain Buddhahood, all gods and humans shall be born from the pure ocean of the Tathāgata's wisdom." As for "ocean", it means that the Buddha's sarvākārajñatā is deep, vast, and boundless, not lodging the corpses of the two vehicles, mixed goods, or the middling and inferior; it is metaphorically compared to an ocean. Therefore it is said: "The unshakeable assembly of gods and humans / Is born from the ocean of pure wisdom." "Unshakeable" means that those gods and humans have accomplished Mahāyāna faculties and cannot be swayed or shaken.