अग्नि , the revered invoker and purifier, is called upon to convey sacrifices to the immortals [rv-3-21-1 ] rv • Book 3 and accept oblations. अग्नि receives offerings of buttery drops [rv-3-21-2 ] rv • Book 3 and is invoked as a wise seer and protector [rv-3-21-3 ] rv • Book 3 who grants affluence and protection. The sacrificial marrow, extracted for अग्नि , falling upon the altar, is distributed amongst the gods [rv-3-21-5 ] rv • Book 3 .