इन्द्र , the mighty guardian, delights in offerings as priests prepare the sacrificial rites [rv-7-21-1 ] rv • Book 7 . He, the hero, released rivers from अहिऽस् grasp, invoking fear and conquering foes with his thunderbolt [rv-7-21-3 ] rv • Book 7 . Protecting from evil, इन्द्रऽस् guardianship is unmatched, offering protection and prosperity to his devotees [rv-7-21-5 ] rv • Book 7 .