Charles Ellicott Commentary 2 Chronicles 32:2

"And when Hezekiah saw that Sennacherib was come, and that he was purposed to fight against Jerusalem," — 2 Chronicles 32:2 (ASV)

And that he was purposed to fight. —Literally, and his face was for the war. (Compare to 2 Chronicles 20:3; Luke 9:53.)

To stop. — To close in with masonry, so as to conceal. (But compare to 2 Kings 3:19; 2 Kings 3:25.) Septuagint, ἐμφράξαι τά ὕδατα.

They did help him. —By gathering much people together (2 Chronicles 32:4).