Isaiah 37:10 - Albert Barnes' Notes on the Bible

Let not thy God deceive thee - The similar message which had been sent by Rabshakeh Isaiah 36:14-15 had been sent mainly to the people to induce them not to put confidence in Hezekiah, as if he would deceive them by leading them to rely on the aid of Yahweh. As that had failed, he, as a last resort, sent a similar message to Hezekiah himself, designed to alienate his mind from God, and assuring him that resistance would be vain. To convince him, he referred him Isaiah 37:11-13 to the conquests of the Assyrians, and assured him that it would be impossible to resist a nation that had subdued so many ethers. He had it not in his power to add Egypt to the list of subdued kingdoms, or it would have been done.