Bhagavad Gita · Karma YogaChapter 3, Shloka 10 (3.10)

Born together. Beings and yajña — saha — were created together. Along with life came the law of give and take.

"Iṣṭa-kāma-dhuk". Dhuk — one that gives milk (from duh — to milk); like Kamadhenu, the wish-fulfilling cow. Shankaracharya: iṣṭān abhipretān kāmān phala-viśeṣān dogdhi — that which "yields like milk" the desired results.

Acharya Ramanuja — creation out of compassion. In the dissolution, souls bound to prakriti, without name and form, were cetanetara-kalpāḥ — almost like inert matter, unfit for any human goal. Parama-kāruṇikaḥ — the supremely compassionate Lord, wishing to uplift them, created them along with yajña as a form of his own worship. And he said — prosper by this yajña; may it fulfil for you mokṣākhyasya kāmasya — the supreme desire called liberation, and the other desires connected with it.

"Prajāḥ" in Shankara's commentary. In this verse Shankaracharya calls the prajāḥ the trayo varṇāḥ (the three varnas) — that is, in his view this concerns those traditionally eligible for Vedic yajña. This is his framework of scriptural ritual; the Gita's broad idea of yajña (4.24–4.33) and its path of devotion (9.26–9.27, 9.32) are not limited to any varna.