Charak Samhita
आहारशक्तितश्चेतिआहारशक्तिरभ्यवहरणशक्त्याजरणशक्तयाचपरीक्ष्या; बलायुषीह्याहारायत्ते ॥१२०॥
[Assessment of aharashakti (power of assimilation)] Examination regarding power for assimilation (aharashakti) is to be done in respect of power of ingestion as well as digestion. Strength and life depends on diet.
english translation
AhArazaktitazcetiAhArazaktirabhyavaharaNazaktyAjaraNazaktayAcaparIkSyA; balAyuSIhyAhArAyatte ॥120॥
hk transliteration by Sanscript