Isaiah 37:20

Therefore let Jehovah shew, in this crisis of religion, that He alone possesses true Godhead.

that thouart the Lord, even thou only Lit. "that thou art Jehovah alone," cf. Deuteronomy 6:4. But the easier, and perhaps the original, reading is given by 2 Kings "that thou Jehovah art God alone" (see Isaiah 37:16).