Bhagavad Gita, Chapter 8, Verse 10

प्रयाणकाले मनसाऽचलेन भक्त्या युक्तो योगबलेन चैव । भ्रुवोर्मध्ये प्राणमावेश्य सम्यक् स तं परं पुरुषमुपैति दिव्यम्

prayāṇakāle manasā'calena bhaktyā yukto yogabalena caiva | bhruvormadhye prāṇamāveśya samyak sa taṃ paraṃ puruṣamupaiti divyam

Translation

Whoso meditates on the Sage, the Ancient, the Ruler, smaller than an atom, the Dispenser of all, of unthinkable nature, glorious like the Sun, beyond the darkness, (whoso meditates on such a Being) at the time of death, with a steady mind endued with devotion and strength of Yoga, well fixing the life-breath betwixt the eye-brows, he reaches that Supreme Puruṣa Resplendent.

— Alladi Mahadeva Sastri

Word meanings

prayāṇakāle
in the time of forthgoing
manasā
with mind
acalena
(with) unshaken
bhaktyā
with devotion
yuktaḥ
joined
yogabalena
of yoga, by strength
ca
and
eva
only
bhruvoḥ
of the (two) eyebrows
madhye
in the middle
prāṇam
breath
āveśya
having placed
samyak
together
saḥ
he
tam
that
param
highest
puruṣam
man
upaiti
goes
divyam
divine

Śaṅkarācārya's commentary

Like the Sun, He is glorious with the splendour of His Eternal Intelligence (Nitya-Chaitanya) which is beyond the darkness of delusion or nescience (Ajñāna). The strength of Yoga consists in the steadiness of mind which results from the after-effects of the constant practice of samādhi. At first the mind (citta) is subdued in the lotus of the heart (hṛdaya-puṇḍarīka); then, by means of the up-going nāḍī (suṣumnā), after gradually obtaining control over the several stages of matter (earth and the other four rudimental elements), the life-breath of the heart is drawn up and carefully fixed betwixt the eye-brows. By this means the wise man, the Yogin, reaches the Supreme Puruṣa, who is resplendent.