ēvaṅ paramparāprāptamimaṅ rājarṣayō viduḥ.
sa kālēnēha mahatā yōgō naṣṭaḥ parantapa৷৷4.2৷৷
श्रीमद् भगवद्गीता
मूल श्लोकः
English Commentary by Swami Sivananda
4.2 ēvam thus, paramparāprāptam handed down in regular succession, imam this, rājarṣayaḥ the royal sages, viduḥ knew, saḥ this, kālēna by lapse of time, iha here, mahatā by long, yōgaḥ Yoga, naṣṭaḥ destroyed, parantapa O Parantapa.
Commentary:
The royal sages: Men who were kings and at the same time sages also, learnt this Yoga.Arjuna could burn or harass his foes, like the sun, by the heat of his valour and power. Hence the name Parantapa.