佛說觀佛三昧海經 3.29

3.29

The Buddha told his father the king: “The Tathāgata's mark of the tongue and the merits of his tongue, and the sphere of contemplating the tongue, are like this! After the Buddha's parinirvāṇa, for those who cultivate sharp mindfulness of the Buddha and contemplate the Buddha's tongue, the sphere of their mental eye will be as spoken above. One who performs this contemplation will eradicate the sins of life and death accumulated over a hundred billion eighty-four thousand kalpas, and upon relinquishing this body in another life, will encounter eighty billion Buddhas. In the presence of those Buddhas, they will see those Buddhas' marks of the broad and long tongue emitting great light, just like this! Thereafter, they will receive the prediction of the path to bodhi.”