The Compendium of Caraka 4.6.12

4.6.12

kārtsnyena śarīravṛddhikarāstvime bhāvā bhavanti; tadyathā---kālayogaḥ, svabhāvasaṃsiddhiḥ, āhārasauṣṭhavam, avighātaśceti//

These factors, however, produce growth of the body in its entirety: namely—the conjunction of time, inherent nature, excellence of food, and absence of impediment.