इन्द्र , मरुत्स् , अग्नि , मित्र-वरुण , द्रविणोदस् , अश्विन्स् , and त्वष्टा are invoked to partake in the sacrificial rite with ऋतु , the embodiment of proper duty, enhancing its efficacy. They are invited to drink the sacred सोम , consecrate the ceremony, and bestow wealth and favor upon the pious, ensuring prosperity and divine harmony [rv-1-15-1 ] rv • Book 1 .