Bhagavad Gita Chapter 3.10
saha-yajñāḥ prajāḥ sṛṣṭvā
purovāca prajāpatiḥ
anena prasaviṣyadhvam
eṣa vo ‘stv iṣṭa-kāma-dhuk
Translation
In the beginning of creation, the Lord of all creatures sent forth generations of men and demigods, along with sacrifices for Vishnu, and blessed them by saying, “Be thou happy by this yajna [sacrifice] because its performance will bestow upon you everything desirable for living happily and achieving liberation.”