John Gill Commentary Ezekiel 19:6

"And he went up and down among the lions; he became a young lion, and he learned to catch the prey; he devoured men." — Ezekiel 19:6 (ASV)

And he went up and down among the lions The kings, as the Targum; kings of neighbouring nations, as Pharaoh king of Egypt, and Nebuchadnezzar king of Babylon; and sometimes he was subject to the one, and sometimes to the offer: and his going up and down among them may denote his continuance as a king; for whereas his brother reigned but three months, he reigned eleven years:

he became a young lion ; an oppressive prince, a cruel and tyrannical king:

and learned to catch the prey, [and] devoured men ; he was notorious for his acts of injustice and arbitrary power; for the detaining the wages of workmen, and for his oppression, violence, and rapine, and shedding of innocent blood, (Jeremiah 22:13Jeremiah 22:17) .