arjuna uvācha
aparaṁ bhavato janma paraṁ janma vivasvataḥ
katham etad vijānīyāṁ tvam ādau proktavān iti||4||

Meaning : Arjuna said:
Your birth happened recently, but the sun god Vivasvan was born long before you.
How should I understand that You taught him this yoga long ago?