as the army of the king of Babylon was fighting against Jerusalem and the remaining cities of Judah--against Lachish and Azekah. For these were the only fortified cities remaining in Judah.

Joshua 10:3
Therefore Adoni-zedek king of Jerusalem sent word to Hoham king of Hebron, Piram king of Jarmuth, Japhia king of Lachish, and Debir king of Eglon, saying,

Joshua 10:5
So the five kings of the Amorites--the kings of Jerusalem, Hebron, Jarmuth, Lachish, and Eglon--joined forces and advanced with all their armies. They camped before Gibeon and made war against it.

Joshua 10:10
And the LORD threw them into confusion before Israel, who defeated them in a great slaughter at Gibeon, pursued them along the ascent to Beth-horon, and struck them down as far as Azekah and Makkedah.

2 Kings 14:19
And conspirators plotted against Amaziah in Jerusalem, and he fled to Lachish. But men were sent after him to Lachish, and they killed him there.

2 Kings 18:14
So Hezekiah king of Judah sent word to the king of Assyria at Lachish, saying, "I have done wrong; withdraw from me, and I will pay whatever you demand from me." And the king of Assyria exacted from Hezekiah king of Judah three hundred talents of silver and thirty talents of gold.

2 Chronicles 11:5
Rehoboam continued to live in Jerusalem, and he built up cities for defense in Judah.

2 Chronicles 11:9
Adoraim, Lachish, Azekah,

Isaiah 36:2
And the king of Assyria sent the Rabshakeh, with a great army, from Lachish to King Hezekiah at Jerusalem. And he stopped by the aqueduct of the upper pool, on the road to the Launderer's Field.

When the king of Babylon's army fought against Jerusalem, and against all the cities of Judah that were left, against Lachish, and against Azekah: for these defended cities remained of the cities of Judah.