Yogashataka 81

81

nimbasya tailaṃ prakṛtistham evaṃ nasyāṃ niṣiktaṃ vidhinā yathāvat /
māsena tat kṣīraghṛtopayojyaṃ jarāprabhūtaṃ palitaṃ nihanti //

Oil of neem in its natural state, instilled properly as a nasal errhine according to rule, / accompanied by a diet of milk and clarified butter for a month, destroys grey hair caused by old age.