佛說觀佛三昧海經 2.43

2.43

佛告父王：「如來有無量相好，一一相中，八萬四千諸小相好，如是相好不及白毫少分功德。是故今日，為於來世諸惡眾生，說白毫相大慧光明消惡觀法。若有邪見極重惡人，聞此觀法具足相貌，生瞋恨心，無有是處。縱使生瞋，白毫相光亦復覆護，暫聞是語除三劫罪，後身生處生諸佛前，如是種種百千億種，觀諸光明微妙境界，不可悉說，念白毫時自然當生。如此觀者名為正觀，若異觀者名為邪觀。

The Buddha said to his father, the king: “The Tathāgata possesses immeasurable marks and secondary characteristics; within each mark, there are eighty-four thousand minor marks and secondary characteristics. Yet such marks and secondary characteristics do not equal even a small fraction of the merit of the white hair-tuft (ūrṇā). Therefore, today, for the sake of evil sentient beings of future eras, I expound the contemplative practice of dispelling evil through the great wisdom-light of the mark of the white hair-tuft. If there are people of extreme, grievous evil with wrong views who, hearing this contemplation method with its fully complete features, were to give rise to thoughts of anger and hatred, that is impossible. Even if they were to produce anger, the light of the mark of the white hair-tuft would still shelter and protect them. Merely hearing these words eliminates the sins of three kalpas, and in their next life they will be born in the presence of the Buddhas. Such hundreds, thousands, and billions of kinds of subtle, wondrous realms of contemplating the various lights cannot be fully described; when contemplating the white hair-tuft, they will naturally arise. Contemplating in this way is called correct contemplation; contemplating otherwise is called incorrect contemplation.”