अग्नि , a mighty deity, is urged to bring happiness by his presence on sacred grass during rituals [rv-4-9-1 ] rv • Book 4 . As the difficult-to-overcome, immortal messenger of the gods, he is revered among मनु 's descendants [rv-4-9-2 ] rv • Book 4 . अग्नि serves as the Hotā or Potā during sacrifices [rv-4-9-3 ] rv • Book 4 , embodying roles such as officiating priest or household master [rv-4-9-4 ] rv • Book 4 . He accepts devout oblations [rv-4-9-5 ] rv • Book 4 and conveys them to the gods [rv-4-9-6 ] rv • Book 4 . अङ्गिरस् accompanies अग्नि in hearing invocations [rv-4-9-7 ] rv • Book 4 , and his protection surrounds the offering donors [rv-4-9-8 ] rv • Book 4