The Compendium of Caraka 1.6.7

1.6.7

varṣāśaraddhemanteṣu tu dakṣiṇābhimukjhe 'arke kālamārgameghavātavarṣābhihatapratāpe śaśini cāvyāhatabale māhendrasalilapraśāntasantāpe jagati arūkṣā rasāḥ pravardhante 'amlalavaṇamadhurā yathākramaṃ tatra balamupacīyate nṛṇāmiti //

In varṣā, śarad, and hemanta, however, when the sun is turned toward the south, its heat checked by time, path, clouds, wind, and rain, and the moon has unhindered strength, the heat of the world pacified by the waters of Indra, the non-dry tastes—sour, salty, and sweet—increase in succession; there strength is accumulated in human beings.