Bhagavad Gita 4.4 Chapter 4, Verse 4

अर्जुन उवाच

अपरं भवतो जन्म परं जन्म विवस्वतः ।
कथमेतद्विजानीयां त्वमादौ प्रोक्तवानिति ॥४.४॥

arjuna uvāca
aparaṃ bhavato janma paraṃ janma vivasvataḥ
kathametadvijānīyāṃ tvamādau proktavāniti

Meaning

Arjuna said: Your birth is recent, while Vivasvan was born long ago. How am I to understand that you taught it in the beginning?

Newly written by Bhajan Dhun — scholarly review in progress.

Reference: Bhagavad Gita 4.4 (Chapter 4, The Yoga of Knowledge and Renunciation of Action, Verse 4)