佛說觀佛三昧海經 1.31

1.31

"At that time, Śakra sat in the Hall of Good Dharma, burned numerous famous incenses, and made a great vow: 'Prajñāpāramitā is the great spell, the unexcelled spell, the unequaled spell. It is true, real, and not false. By upholding this teaching I shall achieve the Buddha Path; may the asuras spontaneously retreat and scatter!' As he spoke these words, four blade-wheels appeared in the sky, spontaneously descending due to Śakra's merit. When they struck above the asura, the asura's ears, nose, hands, and feet fell off all at once, turning the water of the great ocean as red as crimson juice.