Taittirīyopaniṣat 01.03
May we both attain glory together. May we both attain spiritual radiance together. Now, therefore, we shall explain the Upaniṣad (secret teaching) of the Saṃhitā. It is in five topics: concerning the worlds, concerning the luminaries, concerning the knowledge, concerning the progeny, and concerning the self. These they call the great Saṃhitās. Thus (it is said).
Taittirīya Bhāshya 01.03
A testimonial is referenced that elaborates on the fivefold form of the Supreme Lord Nārāyaṇa (Nārāyaṇa, Vāsudeva, Sankarshana, Pradyumna, and Aniruddha) that governs the five topics mentioned.
"The forms of the Supreme Lord Nārāyaṇa, in the five categories of worlds, ending with Aniruddha, are to be meditated upon by the one with four forms.
Indeed, only those beginning with Vāsudeva are in the earlier and later sections; likewise, in the Saṁhitā, at the junction and in the joining, also entirely.
Whoever knows these forms, endowed with all enjoyments, attains the supreme abode of Lord Viṣṇu, called heaven, and is liberated."
