One verse

Srimad Bhagavatam 2.2.21

2.2.21

तस्माद् भ्रुवोरन्तरमुन्नयेत निरुद्धसप्तायतनोऽनपेक्ष: । स्थित्वा मुहूर्तार्धमकुण्ठद‍ृष्टि- र्निर्भिद्य मूर्धन् विसृजेत्परं गत: ॥ २१ ॥

tasmad bhruvor antaram unnayeta niruddha-saptayatano ’napeksah sthitva muhurtardham akuntha-drstir nirbhidya murdhan visrjet param gatah

tasmat
from there
bhruvoh
of the eyebrows
antaram
in between
unnayeta
should be brought in
niruddha
by blocking
sapta
seven
ayatanah
outlets of the life air
anapeksah
independent of all material enjoyment
sthitva
by keeping
muhurta
of a moment
ardham
half
akuntha
back home, back to Godhead
drstih
one whose aim is targeted like that
nirbhidya
punching
murdhan
the cerebral hole
visrjet
should give up his body
param
the Supreme
gatah
having gone to

Thereafter the bhakti-yogi should push the life air up between the eyebrows, and then, blocking the seven outlets of the life air, he should maintain his aim for going back home, back to Godhead. If he is completely free from all desires for material enjoyment, he should then reach the cerebral hole and give up his material connections, having gone to the Supreme.