Jñāneśvarī (commentary on the Bhagavadgītā) 4.19

4.19

evaṃ paraṃparāprāptam imaṃ rājarṣayo viduḥ
sa kāleneha mahatā yogo naṣṭaḥ paraṃtapa
maga āṇikahi ya yogāteṃ |
rājarṣi jāhale jāṇate |
pari tethoni ātāṃ sāṃprateṃ |
neṇije koṇī ||

Then other royal sages too / came to know this yoga; / but since then, at the present time, / no one knows it.