Vaisesika Sūtra 2.2.31

saṁyogād vibhāgācchabdācca śabdaniṣpattiḥ ॥31॥

संयोगाद् विभागाच्छब्दाच्च शब्दनिष्पत्तिः ॥३१॥

[संयोगात् (saṃyogāt): From combination or conjunction; विभागात् (vibhāgāt): From separation or disjunction; शब्दात् (śabdāt): From sound; च (ca): And; शब्द (śabda): Sound or word निष्पत्तिः (niṣpattiḥ): Origin or production of;]

From the conjunction and disjunction of the sounds produced by words, other sounds of the words manifest.