佛說觀佛三昧海經 2.13

2.13

In an instant, they arrived beside the Tree of the Path, gathering at once like clouds, intending to commit evil and rebellion. At that time, the Bodhisattva remained dignified and motionless, entering the supreme contemplation of loving-kindness. The demon king raged deceitfully, brandishing his weapons and roaring, commanding all the troops: “Quickly press in and harm Gautama!” Above, heavenly thunder rumbled, raining down heated iron balls; wheel-knives and weapons piled up one upon another, crisscrossing in the sky. All the ghosts from the four sides attacked simultaneously, but their fire arrows did not approach the Bodhisattva.