Ashtangasamgraha 49.52

49.52

varṣaṃ khādet prāṇadāṃ prātarekāmaśnannannāt pūrvamakṣadvayaṃ ca |

sājyakṣaudraṃ bhojanānte catuṣkaṃ dhātrīkānāṃ tadvayaḥsthāpane 'lam ||

For a year, one should eat one prāṇadā in the morning, and two akṣas before meals; / at the end of the meal, four dhātrīkās with ghee and honey—this is sufficient to maintain youth.