The Compendium of Caraka 4.8.18_1

4.8.18_1

yathā hi bījamanupataptamuptaṃ svāṃ svāṃ prakṛtimanuvidhīyate vrīhirvā vrīhitvaṃ yavo vā yavatvaṃ tathā strīpuruṣāvapi yathoktaṃ hetuvibhāgamanuvidhīyete//

For just as an undamaged seed that has been sown conforms to its own nature—rice [becomes] rice-nature or barley [becomes] barley-nature—so too male and female conform to the division of causes as described.