Then the Rabshakeh said to them, "Say now to Hezekiah, "Thus says the great king, the king of Assyria: "What confidence is this in which you trust?
Isaiah 36:4
Surrounding context
36:3 And Eliakim the son of Hilkiah, who was over the household, Shebna the scribe, and Joah the son of Asaph, the recorder, came out to him.
36:4 Then the Rabshakeh said to them, "Say now to Hezekiah, "Thus says the great king, the king of Assyria: "What confidence is this in which you trust?
36:5 I say you speak of having plans and power for war; but they are mere words. Now in whom do you trust, that you rebel against me?