The Religion and Philosophy of the Veda and Upanishads v1.c18.s1.10

v1.c18.s1.10

As Agni springs from the wood, it is regularly stated that he dwells in plants. On earth too he has a place in the navel (*nābhi*) of the earth, a reference doubtless to the hole in the high place of offering in which the fire is deposited: hence Agni is the navel of immortality.