Isaiah 36:4-6 NIV

4 The field commander said to them, “Tell Hezekiah: “ ‘This is what the great king, the king of Assyria, says: On what are you basing this confidence of yours?
5 You say you have counsel and might for war—but you speak only empty words. On whom are you depending, that you rebel against me?

References for Isaiah 36:5

6 Look, I know you are depending on Egypt, that splintered reed of a staff, which pierces the hand of anyone who leans on it! Such is Pharaoh king of Egypt to all who depend on him.

References for Isaiah 36:6