इन्द्र , the mighty slayer of वृत्र and sovereign, is summoned from heaven to partake in the sacred सोम offerings that illuminate the world [rv-8-82-1 ] rv • Book 8 . These intoxicating libations, mixed with milk, are prepared to evoke his joy, quench his anger, and produce happiness within his heart [rv-8-82-2 ] rv • Book 8 . The hawk's retrieved सोम from the upper worlds is also offered for his exhilaration [rv-8-82-9 ] rv • Book 8 .