Taittirīyopaniṣat 01.22
ahaṃ vṛkṣasya rerivā। kīrtiḥ pṛṣṭhaṃ gireriva। ūrdhvapavitro vājinīvasvamṛtamasmi। draviṇagaṃ savarcasam। sumedhā amṛtokṣitaḥ। iti triśaṅkor vedānuvacanam ॥22॥
"I am the essence of the tree (of worldly existence); my fame is as the mountain's summit. I got purified and got elevated by the swift horse Vājinīvasu, (i.e. the one whose wealth is horses, i.e. Lord Vishnu abiding in the Sun). Because of which I have become immortal, wealthy, radiant, wise, and anointed with nectar" - Thus is the Vedic utterance of Triśaṅku.
Taittirīya Bhāshya 01.22
Testimonial from an ancient text, Yajuḥ-viveka is referenced to understand the above ecstatic utterance of King Triśaṅku, descendant of Manu, after he gets liberated by the grace of supreme Lord Hari. The cryptic word 'Vājinīvasu' i.e. the one whose wealth is horses, here refers to Lord Vishnu who abides in the Sun, possessor of swift horses.
"saṃsāravṛkṣacchettā'haṃ matkīrtiḥ parvatopamā। atyutkṛṣṭena hariṇā pāvito'smi yataḥ sphuṭam॥"
I am the one who has cut down the tree of worldly existence; my fame is as great as a mountain. I have been purified by the supreme Lord Hari, and clearly this is evident.
"vājirūpaś ca netā ca vājinīḥ sūrya ucyate। tatrastho bhagavān viṣṇuḥ samprokto vājinīvasuḥ॥"
The Sun, in the form of a horse and as a leader, is called the possessor of horses. There, the Lord Viṣṇu, abiding in it, is said to be Vājinīvasu, i.e. the one whose wealth is horses.
"tenāmṛto'smi draviṇaṃ nityānandasvarūpataḥ। tenāmṛtena sikto'haṃ tena vyāpto yatas sadā॥"
Because of that, I am immortal, and my wealth is of the nature of eternal bliss; by that immortality I am moistened, and by that I am always pervaded.
"ityāha mantradṛk pūrvaṃ triśaṅkurmānavo nṛpaḥ॥"
"Thus, the seer of mantras, King Triśaṅku, descendant of Manu, spoke in earlier times."
iti yajurviveke॥
- stated thus in the ancient text Yajuḥ-viveka, the discernment of the Yajur.
