Isaiah 36:6

Lo, thou trustest in the staff of this broken reed, on Egypt, as Rabshakeh contemptuously calls the ally of Judah, whereon if a man lean, it will go into his hand and pierce it. So is Pharaoh, king of Egypt, to all that trust in him, the Assyrian general naturally deriding and mocking the strength of Assyria's rival for world supremacy.