The Compendium of Caraka 6.3.42

6.3.42

prākṛtaḥ sukhasādhyastu vasantaśaradudbhavaḥ/
uṣṇamuṣṇena saṃvṛddhaṃ pittaṃ śaradi kupyati//

The seasonal [fever], however, arising in spring and autumn, is easily cured. / Pitta, increased by heat through heat, is provoked in autumn;