Ashtangasamgraha 2.35

2.35

vidyādasādhyamevātaḥ sādhyāsādhyasamāgamam |

nāsādhyaḥ sādhyatāṃ yāti sādhyo yātitvasādhyatām ||

tadeva vātānugataṃ vikṛtarūkṣāruṇākṣam |

pittānugataṃ piṅgākṣam |

śleṣmānugataṃ śuklākṣam |

raktānugataṃ raktākṣamiti ||

prasuptaṃ kṛṣṇasarpaṃ sa karāgreṇa parāmṛśet ||

yojyo mṛdvanapāyitvādviśeṣāccaturaṅgulaḥ ||

vacādvibṛhatīpāṭhākaṭukātiviṣāghanaiḥ |

madhuraiśca ghṛtaṃ siddhaṃ siddhaṃ daśanajanmani ||

Therefore, one should know the combination of curable and incurable as incurable alone.
An incurable does not attain curability, but a curable one becomes incurable.

When following vāta, it has abnormal, dry, and reddish eyes;
when following pitta, yellowish eyes;
when following śleṣman, white eyes;
when following blood, red eyes.

He would touch a sleeping black cobra with his fingertip.
Caturaṅgula should be employed especially because of its mildness and harmlessness.

Ghee prepared with vacā, both bṛhatīs, pāṭhā, kaṭukā, ativiṣā, and ghana,
as well as sweet herbs, is perfected for the eruption of teeth.