佛說觀佛三昧海經 2.9

2.9

「是時魔王，顧視夜叉告令諸鬼：『今者鬼兵既已雲集，瞿曇善人，或能知呪，當興四兵。』以魔王珠化作四兵，象馬車步列仗如林，甚可怖畏，直從空下至道樹邊。

At that time, the demon king looked around at the yakṣas and commanded all the ghosts: “Now that the ghost army has gathered like clouds, Gautama is a good man and may perhaps know spells; we must raise the fourfold army.” Using his demon king’s wish-fulfilling pearl, he magically conjured the fourfold army: elephants, horses, chariots, and infantry arrayed with weapons like a forest, exceedingly terrifying, descending straight from the sky to the side of the Tree of the Path.