佛說觀佛三昧海經 7.43

7.43

At that time, the Brahmā King, Śakra Devānām Indra, and countless sons of devas paid homage to the Buddha, knelt long with palms joined, and said to the Buddha: “Bhagavat! We now have been able to behold the Tathāgata’s supreme form among forms. We vow that in future ages, sentient beings in the turbid and evil [world] will focus their mindfulness and ponder so as to behold the Buddha's rūpakāya. May this vow not be in vain! What we have now spoken and what we have seen are true and not in vain; may we and the host of devas become just like the Buddha’s body.” As they spoke these words, they each saw one million lights issue from within their own minds, each light transforming into immeasurable hundreds of thousands of transformation Buddhas, and they saw their own bodies become of true golden color, precisely equal to and no different from Nanda.