Sankhya Karika Verse 57
Sanskrit Verse
वत्सविवृद्धिनिमित्तं क्षीरस्य यथा प्रवृत्तिरज्ञस्य । पुरुषविमोक्षनिमित्तं तथा प्रवृत्तिः प्रधानस्य ॥ ५७ ॥
Transliteration
vatsa vivṛddhi nimittaṃ kṣīrasya yathā pravṛttiḥ ajñasya | puruṣa vimokṣa nimittaṃ tathā pravṛttiḥ pradhānasya ||
Translation
Just as is the secretion of milk, which is un intelligent, for the sake of nourishment of the calf, so is the creation of the Pradhana for the sake of the release of Purusa.
Reference: Sankhya Karika

Muni's Play