एवं परम्पराप्राप्तमिमं राजर्षयो विदुः।
स कालेनेह महता योगो नष्टः परन्तप।।4.2।।
4.2 The king-sages knew this (yoga) which was received thus in regular succession. That Yoga, O destroyer of foes, in now lost owing to a long lapse of time.
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.
Evam paramparaa praaptam imam raajarshayo viduh; Sa kaaleneha mahataa yogo nashtah parantapa.
evam—thus; paramparā—in a continuous tradition; prāptam—received; imam—this (science); rāja-ṛiṣhayaḥ—the saintly kings; viduḥ—understood; saḥ—that; kālena—with the long passage of time; iha—in this world; mahatā—great; yogaḥ—the science of Yog; naṣhṭaḥ—lost; parantapa—Arjun, the scorcher of foes