Verse
एवं परम्पराप्राप्तम् इमं राजर्षयो विदुः ।स कालेनेह महता योगो नष्टः परंतप ॥
evaṃ paramparāprāptam imaṃ rājarṣayo viduḥsa kāleneha mahatā yogo naṣṭaḥ paraṃtapa
And so it came down from royal sage to royal sage till it was lost in the great lapse of Time, O Parantapa.
Gītā 4·2