Passage cross-references.

And Jesus answered him, The first of all the commandments is, Hear, O Israel; The Lord our God is one Lord: …

Thus saith the LORD the King of Israel, and his redeemer the LORD of hosts; I am the first, and I am the last; and beside me there is no God.

For there is one God, and one mediator between God and men, the man Christ Jesus;

I am the LORD, and there is none else, there is no God beside me: I girded thee, though thou hast not known me: …

And this is life eternal, that they might know thee the only true God, and Jesus Christ, whom thou hast sent.

I and my Father are one.

I am the LORD: that is my name: and my glory will I not give to another, neither my praise to graven images.

Fear ye not, neither be afraid: have not I told thee from that time, and have declared it? ye are even my witnesses. Is there a God beside me? yea, there is no God; I know not any.

Unto thee it was shewed, that thou mightest know that the LORD he is God; there is none else beside him. …

But the LORD is the true God, he is the living God, and an everlasting king: at his wrath the earth shall tremble, and the nations shall not be able to abide his indignation. …

As concerning therefore the eating of those things that are offered in sacrifice unto idols, we know that an idol is nothing in the world, and that there is none other God but one. …

I am the LORD thy God, which brought thee out of the land of Egypt, from the house of bondage.

And Elijah came unto all the people, and said, How long halt ye between two opinions? if the LORD be God, follow him: but if Baal, then follow him. And the people answered him not a word.

Wherefore David blessed the LORD before all the congregation: and David said, Blessed be thou, LORD God of Israel our father, for ever and ever.

So the servants of king Hezekiah came to Isaiah.