Verses on Sāṃkhya 58.3

58.3

yathā tṛṇodakaṃ gavā bhakṣitaṃ pītaṃ ca kṣīrabhāvena pariṇamati, vatsavṛddhiṃ karoti, puṣṭe vatse nivartate | evaṃ puruṣavimokṣanimittaṃ pradhānasyājñasya pravṛttiḥ //

Just as grass and water eaten and drunk by a cow transform into the state of milk, bring about the growth of the calf, and cease when the calf is nourished, so the activity of insentient primordial matter is for the sake of the liberation of the spirit.