Bhagavad Gita 4.1
श्री भगवानुवाच · śrī bhagavānuvāca
इमं विवस्वते योगं प्रोक्तवानहमव्ययम्।विवस्वान् मनवे प्राह मनुरिक्ष्वाकवेऽब्रवीत्॥
imaṃ vivasvate yogaṃ proktavānahamavyayam |vivasvān manave prāha manurikṣvākave'bravīt ||
The Blessed Lord said, "I taught this imperishable Yoga to Vivasvan; he then told it to Manu; Manu proclaimed it to Ikshvaku.
Lord Shri Krishna said: I taught this imperishable philosophy to Vivaswān, the founder of the Sun dynasty; Vivaswān gave it to Manu, the lawgiver, and Manu to King Ikshvāku.
Our plain-language meaning of this verse is waiting for scholar review.