Śrīmad-Bhāgavatam 11.13.38
మయైతదుక్తం వో విప్రా గుహ్యం యత్ సాఙ్ఖ్యయోగయో: ।
జానీత మాగతం యజ్ఞం యుష్మద్ధర్మవివక్షయా ॥ ౩౮ ॥
mayaitad uktaṁ vo viprā
[mayaitad uktam vo vipraa]
guhyaṁ yat sāṅkhya-yogayoḥ
[guhyam yat saankhya-yogayoh]
jānīta māgataṁ yajṣaṁ
[jaaneeta maagatam yajsham]
yuṣmad-dharma-vivakṣayā
[yushmad-dharma-vivakshayaa]
Word-for-word
mayā
—
by Me
etat
—
this (knowledge)
uktam
—
has been spoken
vaḥ
—
unto you
viprāḥ
—
O brāhmaṇas
guhyam
—
confidential
yat
—
which
sāṅkhya
—
of the philosophical method of distinguishing matter from spirit
yogayoḥ
—
and the aṣṭāṅga-yoga system
jānīta
—
please understand
mā
—
Me
āgatam
—
who have arrived
yajṣam
—
as Viṣṇu, the Supreme Lord of sacrifice
yuṣmat
—
your
dharma
—
religious duties
vivakṣayā
—
with the desire to explain.
Blended reading (Sanskrit + English inline)
mayaitad uktaṁ vo viprā
mayā
by Me
etat
this (knowledge)
uktam
has been spoken
guhyaṁ yat sāṅkhya-yogayoḥ
jānīta māgataṁ yajṣaṁ
yuṣmad-dharma-vivakṣayā
vaḥ
unto you
viprāḥ
O brāhmaṇas
guhyam
confidential
yat
which
sāṅkhya
of the philosophical method of distinguishing matter from spirit
yogayoḥ
and the aṣṭāṅga-yoga system
jānīta
please understand
mā
Me
āgatam
who have arrived
yajṣam
as Viṣṇu, the Supreme Lord of sacrifice
yuṣmat
your
dharma
religious duties
vivakṣayā
with the desire to explain.
My dear brāhmaṇas, I have now explained to you the confidential knowledge of Sāṅkhya, by which one philosophically distinguishes matter from spirit, and of aṣṭāṅga-yoga, by which one links up with the Supreme. Please understand that I am the Supreme Personality of Godhead, Viṣṇu, and that I have appeared before you desiring to explain your actual religious duties.
Purport
To increase the faith of Lord Brahmā’s sons and establish the prestige of His teachings, Lord Kṛṣṇa now formally identifies Himself as the Supreme Personality of Godhead, Viṣṇu. As stated in Vedic literature, yajṣo vai viṣṇuḥ. After explaining the sāṅkhya- and aṣṭāṅga-yoga systems, the Lord clearly answers the original question of the sages, “Who are You, sir?” Thus, Lord Brahmā and his sons were enlightened by Lord Haṁsa.
— A.C. Bhaktivedanta Swami Prabhupāda
Gauḍīya Ācāryas
Viśvanātha Cakravartī Ṭhākura
Gauḍīya
Translation
O brāhmaṇas! Know that I am Viṣṇu who has come with a desire to teach you dharma. I have spoken the confidential knowledge of Sāṅkhya and aṣṭāṅga-yoga.
The Lord reveals his identity in order that they gain faith. Sāṅkhya means distinguishing ātmā and non-ātmā. Yoga means aṣṭāṅga-yoga. I have come with a desire to teach dharma. It should be understood that Haṁsa also taught about varṇāśrama duties, dharma. This teaching is referred to later in speaking about the duties of varṇāśrāma:
purā kila mahā-bāho dharmaṁ paramakaṁ prabho
yat tena haṁsa-rūpeṇa brahmaṇe ’bhyāttha mādhava
O Lord! O mighty-armed one! Previously in your form of Haṁsa you spoke to Brahmā about dharma that bring supreme happiness to the practitioner. SB 11.17.3
My note
Source: vedabase.io