O King (Yudhisthira), that personality whom, out of ignorance only, you thought to be your maternal cousin, your very dear friend, well-wisher, counselor, messenger, benefactor, etc., is that very Personality of Godhead, Sri Krsna

Expressions researched:
"O King, that personality whom, out of ignorance only, you thought to be your maternal cousin, your very dear friend, well-wisher, counselor, messenger, benefactor, etc., is that very Personality of Godhead, Śrī Kṛṣṇa"

Srimad-Bhagavatam

SB Canto 1

O King, that personality whom, out of ignorance only, you thought to be your maternal cousin, your very dear friend, well-wisher, counselor, messenger, benefactor, etc., is that very Personality of Godhead, Śrī Kṛṣṇa.

SB 1.9.20, Translation and Purport

O King, that personality whom, out of ignorance only, you thought to be your maternal cousin, your very dear friend, well-wisher, counselor, messenger, benefactor, etc., is that very Personality of Godhead, Śrī Kṛṣṇa.

Lord Śrī Kṛṣṇa, although acting as the cousin, brother, friend, well-wisher, counselor, messenger, benefactor, etc., of the Pāṇḍavas, was still the Supreme Personality of Godhead. Out of His causeless mercy and favor upon His unalloyed devotees, He performs all kinds of service, but that does not mean that He has changed His position as the Absolute Person. To think of Him as an ordinary man is the grossest type of ignorance.