2 Kings 19:5-8

So the servants of king Hezekiah came to Isaiah. And Isaiah said unto them, Thus shall ye say to your master, Thus saith the LORD, Be not afraid of the words which thou hast heard, with which the servants of the king of Assyria have blasphemed me. Behold, I will send a blast upon him, and he shall hear a rumour, and shall return to his own land; and I will cause him to fall by the sword in his own land. So Rab-shakeh returned, and found the king of Assyria warring against Libnah: for he had heard that he was departed from Lachish.