Isaiah 36:4-5

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]