Ashtangasamgraha 28.66

28.66

siddhārthakarpaveśāgraṃ ślakṣṇaṃ hemādisambhavam |

kundāśvamārasumanaḥpuṣpavṛntopamaṃ dṛḍham ||

tattailaṃ keśakārṣṇyaṃ janayati paramaṃ nāvanābhyañjanābhyāṃ mūrddhaghrāṇākṣidantaśravaṇagalarujaṃ hanti niśśeṣataśca ||

Its tip should allow the entry of a mustard seed, smooth, made of gold or the like,
firm, and resembling the flower stalk of kunda, oleander, or jasmine.
That oil produces supreme blackness of hair by nasal instillation and head-anointing, and completely destroys pain in the head, nose, eyes, teeth, ears, and throat.