इमं विवस्वते योगं प्रोक्तवानहमव्ययम्।
विवस्वान् मनवे प्राह मनुरिक्ष्वाकवेऽब्रवीत्।।4.1।।
4.1 The Blessed Lord said I imparted this imperishable Yoga to Vivasvan, Vivasvan taught this to Manu, and Manu transmitted this to Iksavaku.
4.1 - 4.2 The Lord said This Karma Yoga declared to you should not be considered as having been taught now merely, for creating encouragement in you for war. I Myself had taught this Yoga to Vivasvan at the commencement of Manus age as a means for all beings to attain release, which is mans supreme end. Vivasvan taught it to Manu, and Manu to Iksvaku. The royal sages of old knew this Yoga transmitted by tradition. Because of long lapse of time and because of the dullness of the intellect of those who heard it, it has been almost lost.
Sri Bhagavaan Uvaacha: Imam vivaswate yogam proktavaan aham avyayam; Vivaswaan manave praaha manur ikshwaakave’braveet.
śhrī-bhagavān uvācha—the Supreme Lord Shree Krishna said; imam—this; vivasvate—to the Sun-god; yogam—the science of Yog; proktavān—taught; aham—I; avyayam—eternal; vivasvān—Sun-god; manave—to Manu, the original progenitor of humankind; prāha—told; manuḥ—Manu; ikṣhvākave—to Ikshvaku, first king of the Solar dynasty; abravīt—instructed