Reference:

"The Sutra of Bodhisattva Ksitigarbha's Fundamental Vows"

At that time, the Tathagata smiled and emitted hundreds, thousands, and myriads of millions of great bright clouds-namely, the great bright clouds of perfection, the great bright clouds of mercy and compassion, the great bright clouds of wisdom, the great bright clouds of Prajna, the great bright clouds of Samadhi, the great bright clouds of Srivatsa, the great bright clouds of blissful virtues, the great bright clouds of meritorious virtues, the great bright clouds of refuge and the great bright clouds of praise, such indescribably bright cloud and so on.