गोविन्द भाष्य (श्रील बलदेव विद्याभूषण - अचिन्त्यभेदाभेद वेदान्त ब्रह्मसूत्र भाष्य सटीक)

heart; anugṛhītaḥ—being the object of mercy; śatādhikayā—by the hundred-and-
first.
Then the top of his home is illumined and the door is revealed by Him. By the
power of transcendental knowledge, by the memory of the path it brings, he
attains the mercy of He who resides in the heart. By the hundred-and-first.
Purport by Śrīla Baladeva Vidyābhūṣaṇa
The enlightened soul departs by the path of the hundred-and-first nāḍī, which
is called Suṣumnā. It is not that the enlightened soul cannot discern where is this
nāḍī. Because of the two causes that begin with the power of transcendental
knowledge, the soul attains the mercy of He who resides in the heart. This is
possible by the power of transcendental knowledge. The effect of transcendental
knowledge is that it enables the soul to remember the correct path to take in
departing from the body. This soul also obtains the mercy of Lord Hari, who
resides in a palace in the heart (hārda). That is the meaning here.
When, accompanied by the voice and the other senses and elements of the
material body, the enlightened soul is about to depart, the top portion (agra) of the
heart, which is his home (okaḥ), becomes illuminated (jvalanam). The door
(dvāraḥ) there is not illuminated by the individual spirit soul. It is Lord Hari, who
resides in the heart (hārda) who illuminates and reveals (prakāśita) that door. In
this way the soul becomes aware of the entrance to the hundred-and-first nāḍī. In
this way the enlightened soul departs.
Adhikaraṇa 9
The Path of the Sun's Rays
Introduction by Śrīla Baladeva Vidyābhūṣaṇa
In the Chāndogya Upaniṣad (8.6.5) it is said:
atha yatraitasmāt śarīrād utkramaty etair eva raśmibhir ūrdhvam ākramate. sa om
iti vā hodvā mīyate sa yāvat kṣipyen manas tāvad ādityaṁ gacchaty etad vai khalu
loka-dvāraṁ viduṣāṁ prapadanaṁ nirodho 'viduṣāṁ tad eṣa ślokaḥ. śataṁ caika
ca. . .