佛說觀佛三昧海經 7.42

7.42

說是語時，天、龍、夜叉、八部鬼神、十二億眾，發阿耨多羅三藐三菩提心，自發誓願：「願於來世常入三昧，見佛色身如今無異。」

When these words were spoken, devas, nāgas, yakṣas, the eight classes of spirits, and an assembly of one billion two hundred million generated the aspiration for anuttarā samyaksaṃbodhi. They made a vow of their own: “May we in future ages always enter samādhi and behold the Buddha's rūpakāya just as it is now, without any difference.”