The city was broken up - Rather, “broken into,” i. e., A breach was made about midnight in the northern wall Ezekiel 9:2, and an entry effected into the second or lower city (see the 2 Kings 22:14 note), which was protected by the wall of Manasseh 2 Chronicles 33:14.
Precipitate flight followed on the advance of the Babylonians to the “middle gate,” or gate of communication between the upper and the lower cities. This position was only a little north of the royal palace, which the king therefore quitted. He escaped by the royal garden at the junction of the Hinnom and Kidron valleys, passing between the two walls which skirted on either side the valley of the Tyropoeon.
Toward the plain - “The Arabah” or the great depression which bounds Palestine Proper on the east (Numbers 21:4 note). The “way toward the Arabah” is here the road leading eastward over Olivet to Bethany and Jericho.