Ashtangasamgraha 50.42

50.42

kṛṣṇā dhātrīphalarajaḥ svarasenaivabhāvitam |

śarkarāmadhusarpirbhirlīḍhvā yo 'nu payaḥ pibet |

sa naro 'śītivarṣopi yuveva parihṛṣyati ||

Kṛṣṇā and powder of dhātrī fruit processed with its own fresh juice, / licked with sugar, honey, and ghee, followed by drinking milk: / that man, even at eighty years of age, is sexually excited like a youth.