“And it came to pass, that when Zedekiah the king of Judah saw them, and all the men of war, then they fled, and went forth out of the city by night, by the way of the king's garden, by the gate betwixt the two walls: and he went out the way of the plain.”
King James Version (KJV)
39:3 The middle gate - The city was encompassed with two walls, before they came to the wall of the temple; the gate in the inner wall is supposed to have been that which is called the middle gate. They would not at first venture farther, 'till they might without hazarding their persons.
39:5 Riblah - Riblah was upon the borders of Canaan. Zedekiah was a tributary to the king of Babylon, and so subject to his power, having made a covenant with him, and secured his allegiance by his oath to him.