Bhagavad Gita Chapter 8 Verse 13
भगवद् गीता अध्याय 8 श्लोक 13

ओमित्येकाक्षरं ब्रह्म व्याहरन्मामनुस्मरन्।
यः प्रयाति त्यजन्देहं स याति परमां गतिम्।।8.13।।



हिंदी अनुवाद - स्वामी तेजोमयानंद
।।8.13।। जो पुरुष ओऽम् इस एक अक्षर ब्रह्म का उच्चारण करता हुआ और मेरा स्मरण करता हुआ शरीर का त्याग करता है वह परम गति को प्राप्त होता है।।


Brahma Vaishnava Sampradaya - Commentary





Except through the Brahmanadi which is one of the 100 nerve centers  in  the
crown of the head; if the life force of a jiva or living  entity  exits  the
body by any of the other 99 nerve centers  it  gets  diverted  and  recycled
back into samsara the perpetual cycle of birth and death  without  attaining
moksa or liberation. Both the Vedic scriptures Vyasa Yoga and  Moksa  Dharma
are specify that when jivas exits through the eyes they go to the sun,  when
they exit  through the ears or any of the 99 centers they go  to  the  place
that corresponds with it but they all remain in the  physical  manifestation
and do not lead to the spiritual plane as does the Brahmanadi.The word hrdi-
nirudhya means confined to the heart and denotes meditating on the  atma  or
soul and the Supreme Lord Krishna.  The  Padma  Purana  states:  Because  He
attracts He is in the  hearts  of  all  jivas  and  attracts  them   towards
Himself, He is known as Hrdi the heart. When the life force is stationed  in
the head it is not possible to abide in the heart.  The  Vyas  Yoga  states:
Wherever the life force abides that is where the  jiva  and  the  mind  also
abide. Thus only the one who has prepared themselves throughout their  lives
in proper mediation is able to concentrate in equanimity and is  fully  able
to be in equanimity. This is the purport.





Now begins the summation.





As  the  Supreme  Lord  Krishna  is  symbolised  by  the  one  word  OM  His
personalised  transcendental  sound  vibration,  the  brahman  or  spiritual
substratum pervading all existence is also known by the one word OM.