Isaiah 36:4-6

Then the Rabshakeh said to them, “Say to Hezekiah, ‘This is what the great king, the king of Assyria says, “What is [the reason for] this confidence that you have? I say, ‘Your plan and strength for the war are only empty words.’ Now in whom do you trust and on whom do you rely, that you have rebelled against me? [2 Kin 18:7] Listen carefully, you rely on the staff of this broken reed, Egypt, which will pierce the hand of any man who leans on it. So is Pharaoh king of Egypt to all who rely on him.