Charak Samhita
व्याधीनामृत्वहोरात्रवयसां भोजनस्य च । विशेषो भिद्यते यस्तु कालावेक्षः स उच्यते ॥३०८॥
॥ Kala (season, state and time)॥ With reference to kālā, the specific classification of diseases (as per the vitiation of Dosha) during different seasons, day and night,different ages and different stages of digestion of food will be described hereafter.
english translation
vyAdhInAmRtvahorAtravayasAM bhojanasya ca । vizeSo bhidyate yastu kAlAvekSaH sa ucyate ॥308॥
hk transliteration by Sanscript