Vaisesika Sūtra 5.1.09

प्रयत्नविशेषान्नोदनविशेषः ॥९॥

prayatnaviśeṣān nodanaviśeṣaḥ ॥9॥

[प्रयत्न-विशेषात् (prayatna-viśeṣāt) - from specific effort; नोधन-विशेषः (nodana-viśeṣaḥ) - specific propulsion;]

Specific propulsion results from specific effort.