One verse

Srimad Bhagavatam 10.87.18

10.87.18

उदरमुपासते य ऋषिवर्त्मसु कूर्पद‍ृश: परिसरपद्धतिं हृदयमारुणयो दहरम् । तत उदगादनन्त तव धाम शिर: परमं पुनरिह यत् समेत्य न पतन्ति कृतान्तमुखे ॥ १८ ॥

udaram upāsate ya ṛṣi-vartmasu kūrpa-dṛśaḥ parisara-paddhatiṁ hṛdayam āruṇayo daharam tata udagād ananta tava dhāma śiraḥ paramaṁ punar iha yat sametya na patanti kṛtānta-mukhe

udaram
the abdomen
upāsate
worship
ye
who
ṛṣi
of sages
vartmasu
according to the standard methods
kūrpa
gross
dṛśaḥ
their vision
parisara
from which all the prāṇic channels emanate
paddhatim
the node
hṛdayam
the heart
āruṇayaḥ
the Āruṇi sages
daharam
subtle
tataḥ
thence
udagāt
(the soul) rises up
ananta
O unlimited Lord
tava
Your
dhāma
place of appearance
śiraḥ
to the head
paramam
the highest destination
punaḥ
again
iha
into this world
yat
which
sametya
reaching
na patanti
they do not fall down
kṛta-anta
of death
mukhe
into the mouth

Among the followers of the methods set forth by great sages, those with less refined vision worship the Supreme as present in the region of the abdomen, while the Āruṇis worship Him as present in the heart, in the subtle center from which all the prāṇic channels emanate. From there, O unlimited Lord, these worshipers raise their consciousness upward to the top of the head, where they can perceive You directly. Then, passing through the top of the head toward the supreme destination, they reach that place from which they will never again fall to this world, into the mouth of death.