佛說仁王般若波羅蜜經 2.8

2.8

"Great King! In ancient times there was a king, Śakra Devānām Indra. King Māndhātṛ came up to heaven wishing to destroy his realm. At that time, Devendra Śakra followed the ritual method of the seven buddhas: he set out one hundred high seats, invited one hundred dharma masters, and had them lecture on the prajñāpāramitā. Māndhātṛ thereupon retreated, as told in the Sūtra on Eradicating Sins.