tartiyena-by excessive development of the third mode of material nature, the mode of ignorance; sva-bhavena-by such nature; bhagavat-nabhim-the abdominal navel of the gigantic form of the Personality of Godhead; asritah-those who are so situated; ubhayoh-between the two; antaram-in between; vyoma-the sky; ye-all of them; rudra-parsadam-associates of Rudra; ganah-population.