Rab-shakeh returned To the king, to give him an account of what had been done, and to receive further orders; leaving behind him the army under the other commanders, mentioned 2 Kings 18:17. For it seems most probable, from the other threatening message here following, that the siege was not raised. He was departed from Lachish Not being able to take it.
Related Commentaries of 2 Kings 19:8
2 Kings 19:8
8 So Rabshakeh returned, and found the king of Assyria warring against Libnah: for he had heard that he was departed from Lachish.