Bhagwad Gita
Chapter 3, Verse 10
सहयज्ञाः प्रजाः सृष्ट्वा पुरोवाच प्रजापतिः।
अनेन प्रसविष्यध्वमेष वोऽस्त्विष्टकामधुक्।।3.10।।
In the beginning of creation, the Lord of all creatures sent forth generations of men and demigods, along with sacrifices for Visnu, and blessed them by saying, "Be thou happy by this yajna [sacrifice] because its performance will bestow upon you all desirable things."