2 Kings 18:19-21

19And Rab-shakeh said to them, Say now to Hezekiah, Thus says the great king, the king of Assyria: What confidence is this wherein thou trustest?

20Thou sayest — but it is a word of the lips — There is counsel and strength for war. Now on whom dost thou rely, that thou hast revolted against me?

21Now behold, thou reliest upon the staff of that broken reed, upon Egypt, on which if a man lean, it goes into his hand and pierces it: so is Pharaoh king of Egypt to all that rely upon him.