When the Rabshakeh heard that the king of Assyria had left Lachish, he withdrew and found the king fighting against Libnah.

Joshua 10:29
Then Joshua and all Israel with him moved on from Makkedah to Libnah and fought against Libnah.

2 Kings 8:22
So to this day Edom has been in rebellion against the hand of Judah. Likewise, Libnah rebelled at the same time.

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 Kings 19:9
Now Sennacherib had been warned about Tirhakah king of Cush: "Look, he has set out to fight against you." So Sennacherib again sent messengers to Hezekiah, saying,

So Rabshakeh returned, and found the king of Assyria warring against Libnah: for he had heard that he was departed from Lachish.