एवं परम्पराप्राप्तमिमं राजर्षयो विदुः। स कालेनेह महता योगो नष्टः परन्तप
evaṁ paramparā-prāptam imaṁ rājarṣhayo viduḥ sa kāleneha mahatā yogo naṣhṭaḥ parantapa
The Divine Kings knew it, for it was their tradition; then, after a long time, it was at last forgotten.
Translated by Shri Purohit Swami
This, handed down in regular succession by the royal sages, was known. This Yoga, however, has been lost here over time, O Parantapa (burner of the foes).
Translated by Swami Sivananda
Word meanings (from the gita/gita dataset)
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