Matthew Poole and continuators on 2 Kings 19:32

32 Therefore thus saith the LORD concerning the king of Assyria, He shall not come into this city, nor shoot an arrow there, nor come before it with shield, nor cast a bank against it.

Which was true, though he sent Rabshakeh, and others, with a great Host against Ierusalem, Chap. 18. 17. Either because that Host went away with Rabshakeh to Libnah; above ver. 8. Or rather, because that Army did not form a close Siege against it, but onely Marched towards it, and disposed themselves so as to block it up at some distance; possibly waiting till the King of Assyria had taken Libnah and Lachish, (which they presumed he would speedily do) and should come up with the rest of his Forces, when they intended to fall more vigorously to their work.