sa ēvāyaṅ mayā tē.dya yōgaḥ prōktaḥ purātanaḥ.
bhaktō.si mē sakhā cēti rahasyaṅ hyētaduttamam৷৷4.3৷৷
श्रीमद् भगवद्गीता
मूल श्लोकः
English Commentary by Swami Sivananda
4.3 saḥ that, ēva even, ayam this, mayā by Me, tē to thee, adya today, yōgaḥ Yoga, prōktaḥ has been taught, purātanaḥ ancient, bhaktaḥ devotee, asi thou art, mē My, sakhā friend, ca and, iti thus, rahasyam secret, hi for, ētat this, uttamam best.
Commentary:
This Yoga contains profound and subtle teachings. Hence it is the supreme secret which is revealed by the Lord.