The Compendium of Caraka 3.8.49

3.8.49

atha saṃbhavaḥ---yo yataḥ saṃbhavati sa tasya saṃbhavaḥ; yathā---ṣaḍdhātavo garbhasya, vyādherahitaṃ, hitamārogyasyeti//

Now, source: that from which something arises is its source; for instance: the six elements are [the source] of the embryo, the unwholesome of disease, and the wholesome of health.